中华胃肠外科杂志最新文献

{"title":"[Progress of circulating tumor DNA in the clinical management of colorectal cancer].","authors":"Z Y Jiang, W Fu","doi":"10.3760/cma.j.cn441530-20230203-00025","DOIUrl":"10.3760/cma.j.cn441530-20230203-00025","url":null,"abstract":"<p><p>Despite the great progress in the treatment of colorectal cancer (CRC), the current standard treatment protocols still have many limitations, and there is an urgent need for more effective biomarkers for personalized patient treatment. Circulating tumor DNA (ctDNA), as a dynamic, non-invasive liquid biopsy approach, overcomes the limitations of tissue biopsy in detecting tumor heterogeneity and molecular evolution. Current evidence from several studies suggests that ctDNA shows great promise in stratifying recurrence risk, guiding treatment decisions, and monitoring early recurrence. In addition, ctDNA can improve the efficiency of clinical research and drug development. However, the lack of standardisation of pre-ctDNA test variables and analysis procedures and the high technical costs limit its promotion and development. In this review, we summarize the available evidence on ctDNA in the clinical management of CRC and present its limitations and strategies for improvement.</p>","PeriodicalId":23959,"journal":{"name":"中华胃肠外科杂志","volume":"27 3","pages":"287-294"},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Application value of the carbon nanoparticles-titanium clip labeling technique for resection of Siewert type II adenocarcinoma of the esophagogastric junction].","authors":"Y C Fang, Y Z Wang, W H Wu, N Lin, J Yang, W B Lu, Z Z Luo, Y Wang","doi":"10.3760/cma.j.cn441530-20230816-00055","DOIUrl":"10.3760/cma.j.cn441530-20230816-00055","url":null,"abstract":"","PeriodicalId":23959,"journal":{"name":"中华胃肠外科杂志","volume":"27 3","pages":"274-277"},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Nutritional support treatment for short bowel syndrome related intestinal failure].","authors":"J Ke, L Kang","doi":"10.3760/cma.j.cn441530-20231207-00206","DOIUrl":"10.3760/cma.j.cn441530-20231207-00206","url":null,"abstract":"<p><p>Intestinal failure is a syndrome characterized by a diminished intestinal function that is inadequate to maintain normal digestion and absorption, leading to systemic metabolic disorder and requiring long-term nutritional supplementation to sustain health and growth. Short bowel syndrome (SBS) is one of the primary causes of intestinal failure. Given the significant differences among SBS patients, nutritional treatment strategies should emphasize individualization. This review focuses on SBS, combining its anatomical and pathological characteristics, to introduce nutritional support treatment plans and experiences for patients with intestinal failure.</p>","PeriodicalId":23959,"journal":{"name":"中华胃肠外科杂志","volume":"27 3","pages":"231-235"},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Pelvic radiotherapy strategy for rectal cancer with hepatic metastasis].","authors":"L Wang, M H Li","doi":"10.3760/cma.j.cn441530-20230504-00142","DOIUrl":"10.3760/cma.j.cn441530-20230504-00142","url":null,"abstract":"<p><p>Hepatic metastasis is the most common in rectal cancer, and patients with resectable hepatic metastasis have better survival. Pelvic radiotherapy has become a key component of multidisciplinary management of rectal cancer with hepatic metastasis. For patients with unresectable hepatic metastasis, palliative radiotherapy to the primary lesion can reduce the risk of bleeding and obstruction and thus improve the quality of life. For patients with resectable hepatic metastasis, pelvic radiotherapy can effectively reduce the local recurrence rate, help some patients avoid surgery and improve their quality of life, and even improve the overall survival. At present, there is no consensus on the standardized treatment mode of pelvic radiotherapy for rectal cancer patients with hepatic metastasis, and it has become a hotspot for research on how to select the population benefiting from radiotherapy, how to optimize multidisciplinary collaboration and radiotherapy plans (long-course radiotherapy versus short-course radiotherapy) and how to preserve organs. This article reviews the research progress in pelvic radiotherapy for rectal cancer with hepatic metastasis in recent years, and provides ideas for individualized pelvic radiotherapy for rectal cancer with hepatic metastasis.</p>","PeriodicalId":23959,"journal":{"name":"中华胃肠外科杂志","volume":"27 3","pages":"295-299"},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Precision nutritional therapy in gastrointestinal tumor].","authors":"D Zhou, S J Wang, X Y Wang","doi":"10.3760/cma.j.cn441530-20231212-00212","DOIUrl":"10.3760/cma.j.cn441530-20231212-00212","url":null,"abstract":"<p><p>Apart from individual genetic background, unhealthy lifestyle and diet, etc., nutrition also plays an important role in the occurrence and progression of gastrointestinal tumors. Although some patients with gastrointestinal tumors can be satisfied with the traditional nutritional support, it is apparently inadequate for the systemic management of all patients. Precision nutrition support, also known as personalized nutrition support, refers to safe and efficient individualized nutrition intervention based on the investigation of individual genetic background, life characteristics, metabolic indicators, intestinal microbial characteristics, and physiological status factors through big data analysis for the prevention and treatment of chronic diseases. This review focuses on the relationship between nutrition and gastrointestinal tumors and discusses the progress of precision nutrition support therapy in the gastrointestinal tumors. Based on this, we hope to achieve effective personalized intervention protocols, and improve the clinical outcome and the overall oncology care of gastrointestinal tumors.</p>","PeriodicalId":23959,"journal":{"name":"中华胃肠外科杂志","volume":"27 3","pages":"225-230"},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Evaluation of safety of early enteral nutrition in patients with severe intra-abdominal infection and intestinal fistulas].","authors":"T Xie, C Chen, D L Yang, W Y Wang, F Chen, Y N He, P F Wang, Y S Li","doi":"10.3760/cma.j.cn441530-20231130-00197","DOIUrl":"10.3760/cma.j.cn441530-20231130-00197","url":null,"abstract":"<p><p><b>Objective:</b> To evaluate the safety of early enteral nutrition (EEN) support in patients with severe intra-abdominal infection and intestinal fistulas. <b>Methods:</b> This was a retrospective cohort study. We collected relevant clinical data of 204 patients with severe intra-abdominal infection and intestinal fistulas who had been managed in the No. 1 Department of General Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University between 1 January 2017 and 1 January 2020. The patients were allocated to EEN or delayed enteral nutrition (DEN) groups depending on whether enteral nutrition had been instituted within 48 hours of admission to the intensive care unit. The primary outcome was 180-day mortality. Other outcomes included rates of intraperitoneal hemorrhage, septic shock, open abdominal cavity, bloodstream infection, mechanical ventilation, and continuous renal replacement therapy. Risk factors for mortality were analyzed by logistic regression. <b>Results:</b> There were no significant differences in hematological data or other baseline characteristics between the two groups at the time of admission to the intensive care unit (all <i>P</i>>0.05). However, septic shock (31.2% [15/48] vs. 15.4% [24/156], χ²=4.99, <i>P</i>=0.025), continuous renal replacement therapy (27.1% [13/48] versus 9.0% [14/156], χ²=8.96, <i>P</i>=0.003), and 180-day mortality (31.2% [15/48] vs. 7.7% [12/156], χ²=15.75, <i>P</i><0.001) were significantly more frequent in the EEN than the DEN group (all <i>P</i><0.05). Multivariate regression analysis showed that older age (OR=1.082, 95%CI:1.027-1.139,<i>P</i>=0.003), worse Acute Physiology and Chronic Health Evaluation (APACHE) II scores (OR=1.189, 95%CI: 1.037-1.363, <i>P</i>=0.013), higher C-reactive protein (OR=1.013, 95%CI:1.004-1.023, <i>P</i>=0.007) and EEN (OR=8.844, 95%CI:1.809- 43.240, <i>P</i>=0.007) were independent risk factors for death in patients with severe intra-abdominal infection and intestinal fistulas. <b>Conclusion:</b> EEN may lead to adverse events and increase mortality in patients with both enterocutaneous fistulas and severe abdominal infection. EEN should be implemented with caution in such patients.</p>","PeriodicalId":23959,"journal":{"name":"中华胃肠外科杂志","volume":"27 3","pages":"241-246"},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Incidence of postoperative complications in Chinese patients with gastric or colorectal cancer based on a national, multicenter, prospective, cohort study].","authors":"S Q Zhang, Z Q Wu, B W Huo, H N Xu, K Zhao, C Q Jing, F L Liu, J Yu, Z R Li, J Zhang, L Zang, H K Hao, C H Zheng, Y Li, L Fan, H Huang, P Liang, B Wu, J M Zhu, Z J Niu, L H Zhu, W Song, J You, S Yan, Z Y Li","doi":"10.3760/cma.j.cn441530-20240218-00067","DOIUrl":"10.3760/cma.j.cn441530-20240218-00067","url":null,"abstract":"<p><p><b>Objective:</b> To investigate the incidence of postoperative complications in Chinese patients with gastric or colorectal cancer, and to evaluate the risk factors for postoperative complications. <b>Methods:</b> This was a national, multicenter, prospective, registry-based, cohort study of data obtained from the database of the Prevalence of Abdominal Complications After Gastro- enterological Surgery (PACAGE) study sponsored by the China Gastrointestinal Cancer Surgical Union. The PACAGE database prospectively collected general demographic characteristics, protocols for perioperative treatment, and variables associated with postoperative complications in patients treated for gastric or colorectal cancer in 20 medical centers from December 2018 to December 2020. The patients were grouped according to the presence or absence of postoperative complications. Postoperative complications were categorized and graded in accordance with the expert consensus on postoperative complications in gastrointestinal oncology surgery and Clavien-Dindo grading criteria. The incidence of postoperative complications of different grades are presented as bar charts. Independent risk factors for occurrence of postoperative complications were identified by multifactorial unconditional logistic regression. <b>Results:</b> The study cohort comprised 3926 patients with gastric or colorectal cancer, 657 (16.7%) of whom had a total of 876 postoperative complications. Serious complications (Grade III and above) occurred in 4.0% of patients (156/3926). The rate of Grade V complications was 0.2% (7/3926). The cohort included 2271 patients with gastric cancer with a postoperative complication rate of 18.1% (412/2271) and serious complication rate of 4.7% (106/2271); and 1655 with colorectal cancer, with a postoperative complication rate of 14.8% (245/1655) and serious complication rate of 3.0% (50/1655). The incidences of anastomotic leakage in patients with gastric and colorectal cancer were 3.3% (74/2271) and 3.4% (56/1655), respectively. Abdominal infection was the most frequently occurring complication, accounting for 28.7% (164/572) and 39.5% (120/304) of postoperative complications in patients with gastric and colorectal cancer, respectively. The most frequently occurring grade of postoperative complication was Grade II, accounting for 65.4% (374/572) and 56.6% (172/304) of complications in patients with gastric and colorectal cancers, respectively. Multifactorial analysis identified (1) the following independent risk factors for postoperative complications in patients in the gastric cancer group: preoperative comorbidities (OR=2.54, 95%CI: 1.51-4.28, <i>P</i><0.001), neoadjuvant therapy (OR=1.42, 95%CI:1.06-1.89, <i>P</i>=0.020), high American Society of Anesthesiologists (ASA) scores (ASA score 2 points:OR=1.60, 95% CI: 1.23-2.07, <i>P</i><0.001, ASA score ≥3 points:OR=0.43, 95% CI: 0.25-0.73, <i>P</i>=0.002), operative time >180 minutes (OR=1.81, 95% CI: 1.42-2.3","PeriodicalId":23959,"journal":{"name":"中华胃肠外科杂志","volume":"27 3","pages":"247-260"},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Application value of laparoscopic double stapler firings and double stapling technique combined with rectal eversion and total extra-abdominal resection in the sphincter-preserving resection of low rectal cancer].","authors":"H Liang, K Q Wu, Q W Fan, W Zheng, H Zhang, J W Bai, J M Li, J Q Chen, C Zhang","doi":"10.3760/cma.j.cn441530-20230806-00034","DOIUrl":"10.3760/cma.j.cn441530-20230806-00034","url":null,"abstract":"<p><p><b>Objectives:</b> To investigate the application value of laparoscopic double stapler firings and double stapling technique combined with rectal eversion and total extra-abdominal resection (LDER) in the anal preservation treatment of low rectal cancer. <b>Methods:</b> Inclusion criteria: (1) age was 18-70; (2) the distance of the lower tumor edge from the anal verge was 4-5 cm; (3) primary tumor with a diameter ≤3 cm; (4) preoperative staging of T1~2N1~2M0; (5) \"difficult pelvis\", defined as ischial tuberosity diameter<10 cm or body mass index>25 kg/m²; (6) patients with strong intention for sphincter preservation; (7) no preoperative treatment (e.g., chemotherapy, radiotherapy, molecular targeted therapy, or immunotherapy); (8) no lateral lymph node enlargement; (9) no previous anorectal surgery; (10) patients with good basic condition who could tolerate surgery. Exclusion criteria: (1) previously suffered from malignant tumors of the digestive tract or currently suffering from malignant tumors out of the digestive tract; (2) patients with preoperative anal dysfunction (Wexner score ≥ 10), or fecal incontinence. The specific surgical steps are as follows: the distal end of the rectum was dissected to the level of the interspace between internal and external sphincters of anal canal. Five centimeters proximal to the tumor, the mesorectum was ligated, and a liner stapler was used to transect the rectum. The distal rectum with the tumor were then everted and extracted through the anus. The rectum was transected 0.5-1.0 cm distal to the tumor with a linear stapler. Full thickness suture was used to reinforce the stump of the rectum, which was then brought back into the pelvic cavity. Finally, an end-to-end anastomosis between the colon and the rectum was performed. A retrospective descriptive study was performed of the clinical and pathological data of 12 patients with T1-T2 stage low rectal cancer treated with LDER at Henan Provincial People's Hospital from January 2020 to December 2022. <b>Results:</b> All 12 patients successfully completed LDER with sphincter preservation, without conversion to open surgery or changes in surgical approach. The median surgical time was 272 (155-320) minutes, with a median bleeding volume of 100 (50-200) mL. No protective stoma was performed, and all patients received R0 resection. The average hospital stay was 9 (7-15) days. There were no postoperative anastomotic leakage or perioperative deaths. All 12 patients received postoperative follow-up, with a median follow-up of 12 months (6-36 months) and a Wexner score of 8 (5-14) at 6 months postoperatively. There was no tumor recurrence or metastasis during the follow-up period. <b>Conclusions:</b> LDER is safe and effective for the treatment of low rectal cancer.</p>","PeriodicalId":23959,"journal":{"name":"中华胃肠外科杂志","volume":"27 3","pages":"283-286"},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Malnutrition in advanced gastrointestinal cancer patients and nutritional support therapy].","authors":"G H Wu","doi":"10.3760/cma.j.cn441530-20240103-00005","DOIUrl":"10.3760/cma.j.cn441530-20240103-00005","url":null,"abstract":"<p><p>The advancement of comprehensive treatment has allowed an increasing number of patients with gastrointestinal tumor to achieve long-term survival. In current clinical practice, there is a growing population of patients with advanced gastrointestinal tumor. Due to various factors, such as tumor burden, treatments including chemotherapy and radiation therapy, as well as underlying diseases, patients with advanced gastrointestinal tumor often experience malnutrition, which negatively impacts their clinical outcomes. The mechanism of malnutrition in patients with advanced gastrointestinal tumor is complex, and conventional nutritional support therapy has shown limited effectiveness. With the continuous progress in the concept and technique of nutritional support therapy, the diversification of treatment strategies, and the strengthening of multidisciplinary collaboration, the nutritional management for patients with advanced gastrointestinal tumor tends to be standardized and rational, leading to effective improvement in patients' nutritional status and clinical outcomes. Based on the latest evidence-based medicine, combined with the author's practical experience and insights, this article aims to explore nutritional support therapy for patients with advanced gastrointestinal tumor.</p>","PeriodicalId":23959,"journal":{"name":"中华胃肠外科杂志","volume":"27 3","pages":"215-220"},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Propensity score matching analysis of the short-term efficacy of Kamikawa versus double- tract reconstruction in laparoscopic proximal gastric cancer surgery].","authors":"H C Yang, J X He, Y Yang, Z Han, B Zhang, S Zhou, T Wu, Q Qiao, X L He, N Wang","doi":"10.3760/cma.j.cn441530-20230809-00040","DOIUrl":"10.3760/cma.j.cn441530-20230809-00040","url":null,"abstract":"<p><p><b>Objective:</b> To compare the short-term efficacy of Kamikawa anastomosis and double-tract reconstruction (DTR) after proximal gastrectomy. <b>Methods:</b> This was a propensity score matched, retrospective, cohort study. Inclusion criteria comprised age 20-70 years, diagnosis of gastric cancer by pathological examination of preoperative endoscopic biopsies, tumor diameter ≤4 cm, and location in the upper 1/3 of the stomach (including the gastroesophageal junction), and TNM stage IA, IB, or IIA. The study cohort comprised 73 patients who had undergone laparoscopic proximal gastric cancer radical surgery in the Department of Gastroenterology, Tangdu Hospital, Air Force Medical University between June 2020 and February 2023, 19 of whom were in the Kamikawa group and 54 in the DTR group. After using R language to match the baseline characteristics of patients in a ratio of 1:2, there were 17 patients in the Kamikawa group and 34 in the DTR group. Surgery-related conditions, postoperative quality of life, and postoperative complications were compared between the two groups. <b>Results:</b> After propensity score matching, there were no statistically significant differences in baseline data between the two groups (<i>P</i>>0.05). Compared with the DTR group, the Kamikawa group had longer operative times (321.5±15.7 minutes vs. 296.8±26.1 minutes, <i>t</i>=32.056, <i>P</i><0.001), longer anastomosis times (93.0±6.8 minutes vs. 45.3±7.7 minutes, <i>t</i>=56.303, <i>P</i><0.001), and less bleeding (76 [54~103] mL vs.112 [82~148) mL, <i>Z</i>=71.536, <i>P</i><0.001); these differences are statistically significant. There were no statistically significant differences between the two groups in tumor size, time to first postoperative passage of gas, postoperative hospital stay, number of lymph nodes removed, duration of lymph node dissection, or total hospitalization cost (all <i>P</i>>0.05). The median follow-up time was 6.1 ± 1.8 months. As to postoperative quality of life, the Kamikawa group had a lower rate of upper gastrointestinal contrast reflux than did the DTR group (0 vs. 29.4% [10/34], χ²=6.220, <i>P</i>=0.013); this difference is statistically significant. However, differences between the two groups in quality of life score on follow-up of 3 months and 6 months on the Gastroesophageal Reflux Disease (GERD) scale were not statistically significant (all <i>P</i>>0.05). The incidence of postoperative complications was 2/17 in the Kamikawa group, which is significantly lower than the 41.2% (14/34) in the DTR group (χ²=4.554, <i>P</i>=0.033). <b>Conclusion:</b> Kamikawa anastomosis and DTR are equally safe and effective procedures for reconstructing the digestive tract after proximal gastric surgery. Although Kamikawa anastomosis takes slightly longer and places higher demands on the surgical team, it is more effective at preventing postoperative reflux.</p>","PeriodicalId":23959,"journal":{"name":"中华胃肠外科杂志","volume":"27 3","pages":"261-267"},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140294773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}