Annals of African Medicine最新文献

{"title":"The Varying Faces of MOGAD: A Case Series.","authors":"Mary Anne Poovathingal","doi":"10.4103/aam.aam_159_24","DOIUrl":"https://doi.org/10.4103/aam.aam_159_24","url":null,"abstract":"<p><strong>Abstract: </strong>Myelin oligodendrocyte glycoprotein-immunoglobulin G (MOG-IgG)-associated disease (MOGAD) is an immune mediated demyelinating disorder initially described as a subtype of neuromyelitis optica spectrum disorder with antibodies against MOG. Recently, it has been described as a separate disease entity with unique clinical and radiological features. We herein report the clinical details of eight MOG-IgG-positive patients to highlight the peculiar and varied clinical and radiological features of this condition. Encephalitis was the most common presenting feature in our study, especially in pediatric cases. Tremors and parkinsonism were noted in four cases, of which one was a child. Monophasic course was noted in seven patients. Relapsing course was noted only in a single patient who was initiated on immunosuppressants. The clinical pictures highlight the importance of screening for anti-MOG in individuals with encephalitic and multiaxial symptoms in spite of having normal imaging. Acute demyelinating encephalomyelitis such as imaging features in the pediatric age group may also be a consideration for MOG testing.</p>","PeriodicalId":7938,"journal":{"name":"Annals of African Medicine","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602770","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":"Prevalence and Association of Components of Metabolic Syndrome and Uric Acid among Commercial Drivers in South-West Nigeria.","authors":"David D Ajayi, Taiwo H Raimi, Samuel A Dada","doi":"10.4103/aam.aam_70_24","DOIUrl":"https://doi.org/10.4103/aam.aam_70_24","url":null,"abstract":"<p><strong>Introduction: </strong>Metabolic syndrome (MetS) is a complex cluster of metabolic abnormalities characterized by central obesity, dyslipidemia, hypertension, and impaired glucose metabolism. Emerging evidence suggests a potential link between uric acid levels and MetS, and commercial drivers are exposed to unique occupational hazards that may predispose them to MetS and hyperuricemia.</p><p><strong>Objectives: </strong>The objective of this study was to determine the prevalence of MetS and its relationship with serum uric acid among commercial drivers in Ado-Ekiti, Nigeria.</p><p><strong>Materials and methods: </strong>A cross-sectional study was conducted among commercial drivers in Ado-Ekiti. Relevant information was obtained with a questionnaire, and anthropometry and blood pressure were measured. Fasting plasma glucose and lipid profiles were determined by the standard protocol. MetS was determined with the harmonized criteria. Bivariate correlation and Chi-square were used to determine the relationship between serum uric acid and MetS and its components.</p><p><strong>Results: </strong>There were 106 participants with a median age (interquartile range) of 50 (11) years, with no difference between those with or without MetS. More than 70% of the participants drank alcohol and 75 (70.8%) participants had hyperuricemia. There was no significant correlation between serum uric acid and components of MetS. The prevalence of MetS among all the participants was 21.7% (23/106), with no difference among men with normal uric acid (25.8%) and those with elevated uric acid (20.0%), P = 0.509. Similarly, there was no statistical difference in the prevalence of the components of MetS between the two groups.</p><p><strong>Conclusions: </strong>The prevalence of MetS among the commercial drivers was high, with no difference among men with or without hyperuricemia. Given the importance of this group of people, a system-level public health approach should be adopted to promote a healthy lifestyle to save the lives of the populace.</p>","PeriodicalId":7938,"journal":{"name":"Annals of African Medicine","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602669","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":"Bone Status in Patients with Monoclonal Gammopathy of Undetermined Significance: A Case-Control Study.","authors":"Laila Taoubane, Salim Jennane, Hajar El Hani, Abedarhim Majjad, Hamza Toufik, Najlae El Ouardi, Kamal Doghmi, Lahsen Achemlal, Abdellah El Maghraoui, Ahmed Bezza","doi":"10.4103/aam.aam_34_24","DOIUrl":"https://doi.org/10.4103/aam.aam_34_24","url":null,"abstract":"<p><strong>Objective: </strong>The objective of the study was to assess the prevalence of osteoporosis in patients with monoclonal gammopathy of undetermined significance (MGUS) and to determine the associated factors.</p><p><strong>Materials and methods: </strong>We conducted a case-control study, between January 2019 and April 2019, including patients with MGUS and age- and sex-matched healthy controls (one patient/three controls). For all participants, demographic and clinical data were collected as results of bone mineral density by two-photon X-ray absorptiometry at the lumbar spine and femoral neck.</p><p><strong>Results: </strong>In our series, we included 120 participants: 30 patients with MGUS and 90 healthy controls. In the MGUS carrier group, the mean age was 66.26 ± 8.61 years. The mean monoclonal peak was 11.57 g/L. Densitometric osteoporosis was noted in 12 (40%) patients with MGUS versus 17 (18.9%) in the control group (P = 0.021). In addition, only one patient with MGUS had a vertebral fracture. On multivariate analysis, associated factors with osteoporosis in the MGUS group were age (odds ratio [OR] = 1.14; confidence interval [CI] [1.03-1.26]; P < 0.05) and previous fracture (OR = 3.03; CI [1.22-15.06]; P < 0.05).</p><p><strong>Conclusion: </strong>Our study suggests an increased risk of osteoporosis in patients with MGUS.</p>","PeriodicalId":7938,"journal":{"name":"Annals of African Medicine","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602720","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":"Determination of the Level of von Willebrand Factor, ADAMTS13, and Ratio of ADAMTS13:von Willebrand Factor in Sickle Cell Disease Patients.","authors":"Akaba Kingsley Onorhide, Akpan Samuel Idongesit, Osho Patrick Olanrewaju","doi":"10.4103/aam.aam_25_22","DOIUrl":"https://doi.org/10.4103/aam.aam_25_22","url":null,"abstract":"<p><strong>Background: </strong>Sickle cell anemia (SCA) is a hypercoagulable state characterized by a significant alteration in hemostatic parameters which may predispose an increased risk of vaso-occlusive crisis (VOC). Sickle cell disease (SCD) is the most common genetic disorder in sub-Saharan Africa. Nigeria bears a high disease burden with an estimated prevalence of 1%-3% of its population being affected by the disease. The study seeks to determine the role of von Willebrand factor (VWF), ADAMTS13, and the ratio of ADAMTS13:VWF antigen in the pathogenesis of VOC.</p><p><strong>Objective: </strong>The objective of this study is to evaluate the level of VWF, ADAMTS13, and their ratio in SCD subjects in Calabar and to determine their role in the pathogenesis of VOC.</p><p><strong>Methodology: </strong>This is a comparative study carried out at the University of Calabar Teaching Hospital (UCTH), Calabar. Sixty SCA patients were evaluated in VOC and steady states as well as five parented healthy controls. VWF: Ag and ADAMTS13:Ag were evaluated using Assaypro enzyme-linked immunosorbent assay kits with Lot nos. 01751728 and 04222167R, respectively. Data were analyzed by IBM SPSS Chicago software version 21. The study was approved by the UCTH Institution Ethical Review Board.</p><p><strong>Results: </strong>The mean ages of the SCA subjects and controls were 23.5 ± 7.2 years and 26.5 ± 5.6 years, respectively (P = 0.706). There were 23 (38.3%) males in the SCA group and 21 (42.0%) females in the controls. There was no significant difference in their sex distribution (P = 0.063). The mean (standard deviation [SD]) of VWF in VOC, steady state, and controls were 2.52 ± 0.34, 1.34 ± 0.23, and 1.41 ± 0.23 IU/mL, respectively. The differences in mean were significantly higher in VOC state (P = 0.003). The mean ± SD of ADAMTS13 in VOC, steady state, and controls were 0.61 ± 0.10, 0.44 ± 0.06, and 0.62 ± 0.10 μg/L, respectively. ADAMTS13 levels did not differ significantly across the groups (P = 0.270). Similarly, there was no significant difference between ADAMTS13:VWF ratios across the groups (P = 0.318).</p><p><strong>Conclusion: </strong>VWF level is elevated in VOC state and thus may be implicated in the pathogenesis of VOC. ADAMTS13 and the ratio of ADAMTS13:VWF are not significantly affected in VOC.</p>","PeriodicalId":7938,"journal":{"name":"Annals of African Medicine","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602727","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":"Study of Molecular Markers in Glioma and Their Association with Clinicopathological Features.","authors":"Alka Singh, Anurag Singh, Awadhesh Kumar Jaiswal, Sarita Agrawal, Sushila Jaiswal","doi":"10.4103/aam.aam_127_23","DOIUrl":"https://doi.org/10.4103/aam.aam_127_23","url":null,"abstract":"<p><strong>Context: </strong>Central nervous system tumors are a major cause of morbidity and mortality worldwide. The most prevalent type of primary brain tumor is glioma. The exploration of significant genetic, epigenetic, and transcriptional abnormalities has not only improved our understanding of glioma pathogenesis but has also revealed that these molecular alterations can serve as useful diagnostic markers for more precise classification and are linked to better treatment response and prognosis. Hence, incorporating molecular markers into routine tumor classification is a major priority in modern glioma diagnostics.</p><p><strong>Aim: </strong>The aim is to assess the mutation status of isocitrate dehydrogenase (IDH)-1, alpha-thalassemia/mental retardation syndrome X-linked (ATRX), and tumor protein 53 in glioma, and look for their association with various clinicopathological features.</p><p><strong>Methodology: </strong>A single-center prospective cohort study, where all biopsies of glioma (January 2019 to July 2020) were evaluated, and immunohistochemistry was performed to assess the expression of IDH-1, ATRX, p53, and Ki-67 index. The data were analyzed using IBM SPSS-24 software.</p><p><strong>Results: </strong>Immunohistochemistry was performed in 123 consecutive cases of glioma. IDH-1 mutation was noted in 54 (43.9%) cases and these patients frequently presented with \"seizures\" (P = 0.006). The expression was maximum in World Health Organization (WHO) grade 2 tumors (65.4%) (P < 0.001), with the highest frequency in oligodendrogliomas (100% in WHO grade 2 and 3). Furthermore, these tumors showed lower proliferative indices (P = 0.001). ATRX mutation was noted in 59 (48%) and p53 overexpression was noted in 76 (61.8%) cases. These mutations were significantly associated with astrocytic phenotype (P = 0.03).</p><p><strong>Conclusions: </strong>Molecular characterization of glioma is an important step in modern glioma diagnostics and immunohistochemistry can play an important role. IDH-1 mutation is commonly observed in adults, frontal lobe location, patients presenting with seizures, and WHO grade 2 tumors with the highest frequencies in oligodendrogliomas. ATRX and p53 can be used as surrogate markers for tumors of astrocytic lineage.</p>","PeriodicalId":7938,"journal":{"name":"Annals of African Medicine","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602768","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":"Bilateral Endogenous Streptococcus mitis Endophthalmitis Following Dental Implant: A Case Report and Literature Review.","authors":"Asma Alzuabi, Saleh Alrashed, Saad Aldahmash","doi":"10.4103/aam.aam_121_24","DOIUrl":"https://doi.org/10.4103/aam.aam_121_24","url":null,"abstract":"<p><strong>Abstract: </strong>Endogenous endophthalmitis is an intraocular inflammation caused by the hematogenous spread of microorganisms from distant foci. Streptococcus mitis is a low-virulence organism that inhabits the oral cavity; however, it has rarely been reported to cause endogenous endophthalmitis. In this case report, we present a 63-year-old woman with bilateral asymmetrical endogenous endophthalmitis and a severely affected right eye, with light perception vision, hypotony, and severe anterior and posterior segment inflammation. The left eye exhibited intraretinal infectious infiltrates and minimal vitritis. However, the cause of the S. mitis bacteremia was unclear. Considering the patient's recent dental implant procedure, we hypothesized that the bacteria may have entered the bloodstream through the oral cavity. The patient received intravitreal and systemic antibiotics and underwent pars plana vitrectomy for the right eye. In conclusion, we present a case of endogenous endophthalmitis, presumed following a dental implant procedure. S. mitis may invade the bloodstream following an uncomplicated dental procedure, leading to bilateral endogenous endophthalmitis. Early detection, prompt management with systemic and intravitreal antibiotics, and early vitrectomy may potentially preserve the patient's globe and vision.</p>","PeriodicalId":7938,"journal":{"name":"Annals of African Medicine","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602605","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":"Awareness of Peptic Ulcer Disease among the General Population in Al-Ahsa.","authors":"Mohammed Abdulhadi Alali, Mohammed Yousef Alessa, Fay Salah Alhamad, Zainab Naji Alaithan, Abdullmohssen Hussain Alshaqaq, Sara Khalid Albawardi, Ahmed Ibrahim Alnajjad, Ali Mousa Al Mousa","doi":"10.4103/aam.aam_44_24","DOIUrl":"https://doi.org/10.4103/aam.aam_44_24","url":null,"abstract":"<p><strong>Introduction: </strong>Peptic ulcer disease (PUD) is a condition characterized by discontinuity in the gastrointestinal (GI) tract's inner lining, often caused by factors such as Helicobacter pylori infection and NSAID consumption. PUD can lead to various symptoms, but up to 70% of patients may not experience any symptoms. Diagnosing PUD can be challenging due to the unreliability of individual symptoms and signs. PUD can have serious complications if left untreated. Despite its significance, there is a lack of studies measuring the awareness of PUD among the population in Al-Ahsa, Saudi Arabia. Therefore, this study aimed to assess the level of awareness of PUD among the general population in Al-Ahsa.</p><p><strong>Methodology: </strong>A cross-sectional study was conducted in Al-Ahsa, Saudi Arabia, from September to December 2023. The study included 399 adult residents of Saudi Arabia who agreed to participate. A convenient nonprobability sampling technique was used to collect data. An online self-administered questionnaire, distributed through social media platforms, was used to gather information on participants' awareness of PUD. The questionnaire included sociodemographic characteristics and questions related to PUD awareness. Data were analyzed using SPSS, and qualitative data were presented as numbers and percentages. The Chi-square test was used to examine qualitative data between the two groups.</p><p><strong>Results: </strong>Of the 399 participants, 71.4% demonstrated a good level of knowledge regarding PUD, whereas 28.6% had a low level of knowledge. The sample consisted of nearly equal numbers of males and females, with participants aged 18-55+ years. The majority of participants had attained a bachelor's degree and were employed. The findings suggest a relatively high level of education among the study population.</p><p><strong>Conclusion: </strong>The study highlights the need for increased public awareness of PUD in Al-Ahsa, Saudi Arabia. While some participants showed good knowledge of PUD, a significant number had low awareness. Educational initiatives are essential to improve understanding and knowledge of PUD among the community. By enhancing awareness, early detection and appropriate management of PUD can be promoted, resulting in improved health outcomes for individuals in Al-Ahsa.</p>","PeriodicalId":7938,"journal":{"name":"Annals of African Medicine","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602592","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":"Before Venous Sinus Thrombosis is Attributed to Hyperhomocysteinemia, Alternative Causes Must be Thoroughly Ruled Out.","authors":"Josef Finsterer, Sounira Mehri","doi":"10.4103/aam.aam_130_24","DOIUrl":"https://doi.org/10.4103/aam.aam_130_24","url":null,"abstract":"","PeriodicalId":7938,"journal":{"name":"Annals of African Medicine","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602609","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":"Postpartum Pubic Diastasis with Significant Widening: A Rare Case Series.","authors":"Vinay Prabhat, Kiran Trivedi, Verma Dipak Kumar Prakash Prasad, Rohit Topno","doi":"10.4103/aam.aam_46_24","DOIUrl":"https://doi.org/10.4103/aam.aam_46_24","url":null,"abstract":"<p><strong>Abstract: </strong>Postpartum pubic symphysis diastasis is a relatively rare entity. It is usually associated with cephalopelvic disproportion, macrosomia, multiparity, precipitate labor, difficult labor, difficult forceps delivery, any other pelvic bone pathologies, and underlying connective tissue disorders. Management is typically conservative in most cases, but surgical intervention is sometimes required in cases where pubic symphysis is >4 cm and not responding to conservative management. Case with more than 4 cm of pubic diastasis is usually associated with disruption of the symphyseal ligament, sacroiliac joint capsule, and ligaments. Surgical management promotes early ambulation with good functional recovery and decreases the chances of symphyseal sclerosis, functional disability, and chronic pain. Four female patients with postpartum pubic diastasis of more than 7 cm with an age ranging from 20 to 30 years underwent open reduction and internal fixation using plates and screws.In all four cases, the patient got early ambulation and full functional recovery without any pain, discomfort, and disability at 3 months of follow up. Although conservative management has been advocated for postpartum pubic diastasis typically, surgical intervention should be sought for significant pubic diastasis (more than 4 cm) to promote early full functional recovery and avoid chronic pain, functional disability, and symphyseal sclerosis.</p>","PeriodicalId":7938,"journal":{"name":"Annals of African Medicine","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602650","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":"Rapid Shallow Breathing Index and Ultrasonographic Diaphragmatic Parameters as Predictors of Weaning Outcome in Critically Ill Patients on Mechanical Ventilation.","authors":"Akshay Hiryur Manjunatha Swamy, Girish Bandigowdanahalli Kumararadhya, Darshini Shivaramu, Gurudatt Lakshminarain Challakere, Krishna Ukkalam Chaitanya","doi":"10.4103/aam.aam_45_24","DOIUrl":"https://doi.org/10.4103/aam.aam_45_24","url":null,"abstract":"<p><strong>Background: </strong>Successful weaning is a crucial element in care toward critically ill patients on mechanical ventilation. An attempt was made to propose and assess a reliable predictor of weaning outcome.</p><p><strong>Materials and methods: </strong>A prospective observational study was conducted on 76 patients on mechanical ventilation, assessed by Acute Physiology and Chronic Health Evaluation II (APACHE II) score. For all these patients we calculate Rapid shallow breathing index (RSBI), Ultrasonographic diaphragmatic parameters namely diaphragmatic excursion (DEx), diaphragmatic thickening fraction (DTF) and diaphragmatic contraction velocity (DCV). Values were compared among patients with two groups of successful and failed weaning outcomes, respectively, and statistically analyzed.</p><p><strong>Results: </strong>Of 76 patients included in the study, with ultrasonographic diaphragmatic parameters being measured 30 min into SBT, 71 patients tolerated spontaneous breathing test (SBT) for 2 h and were extubated. Of these, 61 patients did not require reintubation or any form of ventilatory support within 48 h after extubation. There was a statistically significant difference in APACHE II scores, duration of ventilation, oxygen saturation levels, RSBI, DEx, DTF, and DCV between groups of patients who showed successful and failed weaning from mechanical ventilation. There were a significant positive correlation between the duration of ventilation and the RSBI and a significant negative correlation between DEx, DCV, DTF, and duration of ventilation. As predictors of weaning outcome, RSBI showed the best validity, followed by DCV, DTF, and DEx.</p><p><strong>Conclusion: </strong>RSBI can be reliably used as a predictor of weaning outcome in critically ill patients on mechanical ventilation.</p>","PeriodicalId":7938,"journal":{"name":"Annals of African Medicine","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602675","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}