Chong Won Park , Chi Hwa Han , Choon Choo Kim , Dong Jip Kim
{"title":"Randomized, parallel-group comparison of interferon alfa-2b plus hydroxyurea versus hydroxyurea alone in patients with chronic myelogenous leukaemia in chronic phase","authors":"Chong Won Park , Chi Hwa Han , Choon Choo Kim , Dong Jip Kim","doi":"10.1016/0277-5379(91)90563-S","DOIUrl":"10.1016/0277-5379(91)90563-S","url":null,"abstract":"<div><p>A STUDY was undertaken to compare the effect of recombinant interferon alfa-2b (IFN alfa-2b) plus hydroxyurea (HU) with that of HU alone on haematological remission (HR) in patients with chronic phase chronic myelogenous leukaemia (CML). Twenty-one patients were randomized to receive either IFN alfa-2b plus HU (<em>n</em> = 12; seven male and five female; mean age 40 years, range 29–57 years) or HU alone (<em>n</em> = 9; three male and six female; mean age 35 years, range 24–50 years). All patients initially received cytoreductive therapy with HU alone, at a dose according to the white blood cell (WBC) count. When the WBC count decreased to 5−10 × 10<sup>3</sup>/μl, patients were randomized to receive either IFN alfa-2b 2 million units per day by subcutaneous (s.c.) injection plus the adjusted daily dose of HU (> 150 × 10<sup>3</sup>/μl, 4g; 50−150 × 10<sup>3</sup>/μl, 3g; 30−50 × 10<sup>3</sup>/μl, 2g; 10−30 × 10<sup>3</sup>/μl, 1g; and 5−10 × 10<sup>3</sup>/μl, 0g), or HU alone. Thus, patients received no HU until their WBC count rose above 5−10 × 10<sup>3</sup>/μl. Eleven of 12 patients on IFN plus HU achieved a haematological response, including nine with complete haematological remission (CHR) (A1: <em>n</em> = 0, A2: <em>n</em> = 4, A3: <em>n</em> = 3, A4: <em>n</em> = 2) and two with partial haematological remission (PHR) (B1: <em>n</em> = 0, B2: <em>n</em> = 2), while none of the nine patients on HU alone achieved a remission with the above-mentioned doses of HU according to our criteria (A[CHR]: WBC count maintained below 9 × 10<sup>3</sup>/μl without blast and no symptoms or signs associated with CML; subclassified according to the percentage of Ph<sup>1</sup> chromosome: A1, Ph<sup>1</sup> chromosome present in all analyzable metaphases; A2, Ph<sup>1</sup> chromosome present in 35–59%; A3, 5–34%; A4, Ph<sup>1</sup> chromosome absent from all analyzable metaphases. B[PHR]: B1, reduction of peripheral WBC count by at least 50% to < 20 × 10<sup>3</sup>/μl; B2, normalization of peripheral WBC count but persistence of immature form or clinically palpable splenomegaly. Failure: patients who failed to achieve a PHR or CHR as defined above). Using two sets of primer pair sequences encoding bcr-abl mRNA (A primer: 5′-GGAGCTGCAGATGCTGACCAAC-3′ encoding bcr exon II; B primer: 5′-TCAGACCCTGAGGCTCAAAGTC-3′ encoding abl exon II; A′ primer: 5′-CCTGATCTCCTCTGA CTATGAG-3′ encoding bcr exon I; B′ primer: 5′-TCCAGCGAGAAGGTTTTCCTTG-3′ encoding abl exon I), we performed the cDNA-PCR analysis, which revealed persistent bcr-abl mRNA expression in the peripheral mononuclear cells from two patients who achieved CHR induced by IFN. We suggest that IFN therapy should be continued at least until molecular remission is achieved.</p></div>","PeriodicalId":11925,"journal":{"name":"European Journal of Cancer and Clinical Oncology","volume":"27 ","pages":"Pages S27-S28"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0277-5379(91)90563-S","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83700589","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}
Annie J. Sasco , Bernard Fontanière , Marie-Odile Charbaut-Lagarde , Ulrike Kliebsch , Pierre Hamandjian , Anne-Emmanuelle Cornu-Lugrin , Jean-Paul Schnebelen , Vincent Sciortino , Jacques Fabry
{"title":"A systematic survey of breast cancer incidence in the département of Rhône, France","authors":"Annie J. Sasco , Bernard Fontanière , Marie-Odile Charbaut-Lagarde , Ulrike Kliebsch , Pierre Hamandjian , Anne-Emmanuelle Cornu-Lugrin , Jean-Paul Schnebelen , Vincent Sciortino , Jacques Fabry","doi":"10.1016/0277-5379(91)90449-N","DOIUrl":"10.1016/0277-5379(91)90449-N","url":null,"abstract":"<div><p>A systematic survey of all centres of diagnosis and care of breast cancer patients in the Rhône “département” of France was carried out to evaluate, for the year 1985, the incidence rate of breast cancer in an urban, industrialised part of France not covered by a cancer registry. Two hundred and fifty seven institutions or individuals were involved, covering the public and private sectors in the Rhône département, but also in neighbouring cities and elsewhere in France, which also enabled a search to be carried out for cases diagnosed or treated outside the département. Altogether, over this 1-year period, 801 new cases were identified (791 women and 10 men). This study demonstrated a high incidence of female breast cancer (80.5 new cases per 100 000 woman-years, standardised to the world population) which was particularly marked among women aged 40–60. This incidence is higher than that described by the cancer registry of the neighbouring département of Isère, but is close to the incidence found in Geneva. Results also concur with the relatively high mortality rate from breast cancer observed in the Rhône département.</p></div>","PeriodicalId":11925,"journal":{"name":"European Journal of Cancer and Clinical Oncology","volume":"27 12","pages":"Pages 1696-1701"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0277-5379(91)90449-N","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12944350","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}
Norbert Niederle , Thomas Moritz , Otto Kloke , Ursula Wandl , Dieter May , Reinhardt Becher , Thomas Franz , Bertram Opalka , Carl Gottfried Schmidt
{"title":"Interferon alfa-2b in acute- and chronic-phase chronic myelogenous leukaemia: Initial response and long-term results in 54 patients","authors":"Norbert Niederle , Thomas Moritz , Otto Kloke , Ursula Wandl , Dieter May , Reinhardt Becher , Thomas Franz , Bertram Opalka , Carl Gottfried Schmidt","doi":"10.1016/0277-5379(91)90556-S","DOIUrl":"10.1016/0277-5379(91)90556-S","url":null,"abstract":"<div><p>Fifty-four patients with Ph<sup>1</sup>-positive chronic myelogenous leukaemia (CML) (48 with chronic-phase and six acute-phase disease) were treated with interferon alfa-2b subcutaneously (s.c.). The starting dose was 4 million units (MU)/m<sup>2</sup> body surface area daily. It was reduced in parallel with serially determined leucocyte counts, and minimal effective doses were given as maintenance after achieving remission. Haematological remissions were induced in 22 of the 48 patients (46%) with chronic-phase disease. Thirteen patients (27%) revealed partial haematological remission and another 13 no response to treatment. No complete remission could be induced, although minor or partial cytogenetic responses were seen in 16 patients (33%). Moreover, a bcr-abl reduction was detected on Southern blot analysis in two patients. In chronic-phase disease, results of treatment were influenced by elapsed time after diagnosis, extent of previous treatment and interferon dosage. No beneficial effects of interferon were detected in the six patients with acute-phase disease. Principal acute side effects were fever and flu-like symptoms at the beginning of the therapy, which usually subsided within 3–7 days. Chronic side effects, especially weakness and neuropathy, were less frequent but more severe and necessitated discontinuation of treatment in 10 patients. In summary, interferon alfa-2b seems to be an effective treatment in early chronic-phase CML. Long-term effects on the course of the disease, however, must be determined.</p></div>","PeriodicalId":11925,"journal":{"name":"European Journal of Cancer and Clinical Oncology","volume":"27 ","pages":"Pages S7-S14"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0277-5379(91)90556-S","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12961544","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}
Teodoro Chisesi , Marina Congiu , Antonio Contu , Paolo Coser , Luciano Moretti , Adolfo Porcellini , Laura Rancan VI , Luigi Salvagno , Gino Santini , Orazio Vinante , Non-Hodgkin's Lymphoma Cooperative Study Group
{"title":"Randomized study of chlorambucil (CB) compared to interferon (alfa-2b) combined with CB in low-grade non-Hodgkin's lymphoma: An interim report of a randomized study","authors":"Teodoro Chisesi , Marina Congiu , Antonio Contu , Paolo Coser , Luciano Moretti , Adolfo Porcellini , Laura Rancan VI , Luigi Salvagno , Gino Santini , Orazio Vinante , Non-Hodgkin's Lymphoma Cooperative Study Group","doi":"10.1016/0277-5379(91)90566-V","DOIUrl":"10.1016/0277-5379(91)90566-V","url":null,"abstract":"<div><p>Alpha interferon has shown initial promise in the treatment of low-grade non-Hodgkin's lymphoma (NHL), especially with the nodular form of the disease. The present study enrolled 70 NHL patients who received either chlorambucil (CB; 10 mg/day) or CB plus interferon alfa-2b (5 million units (MU)/m<sup>2</sup> subcutaneously three times a week). Among 63 evaluable patients, similar response rates (62.1% and 64.7% respectively) were recorded for the treatment arms. In patients receiving no maintenance therapy, those who received interferon alfa-2b during the induction phase showed a favourable trend in terms of incidence of relapse compared to those who had received chlorambucil alone. During maintenance therapy with interferon alfa-2b, no significant differences in the occurrence of relapse have yet been seen compared to patients on no maintenance therapy. A longer observation period is needed to make a definitive conclusion about the usefulness of interferon maintenance therapy and to evaluate further the effects of the combined schedule of chlorambucil and interferon induction on the duration of remission.</p></div>","PeriodicalId":11925,"journal":{"name":"European Journal of Cancer and Clinical Oncology","volume":"27 ","pages":"Pages S31-S33"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0277-5379(91)90566-V","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12961603","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}
Christoph C. Geilen , Rüdiger Haase , Klaus Buchner , Thomas Wieder , Ferdinand Hucho , Werner Reutter
{"title":"The phospholipid analogue, hexadecylphosphocholine, inhibits protein kinase C in vitro and antagonises phorbol ester-stimulated cell proliferation","authors":"Christoph C. Geilen , Rüdiger Haase , Klaus Buchner , Thomas Wieder , Ferdinand Hucho , Werner Reutter","doi":"10.1016/0277-5379(91)90438-J","DOIUrl":"10.1016/0277-5379(91)90438-J","url":null,"abstract":"<div><p>The antineoplastic agent, hexadecylphosphocholine, a phospholipid analogue, inhibited phosphatidylserine-activated protein kinase C <em>in vitro</em> at concentrations higher than 40 μmol/l. The half-inhibitory concentration (IC<sub>50</sub>) was 62 μmol/l. Another alkylphosphocholine, dodecylphosphocholine, did not have an inhibitory effect on protein kinase C. At the same concentrations, hexadecylphosphocholine antagonised the phorbol ester-stimulated proliferation of Madin-Darby canine kidney cells whereas dodecylphosphocholine had no effect. In addition, phorbol ester-induced morphological changes of these epithelial cells were antagonised by hexadecylphosphocholine. Both effects of hexadecylphosphocholine, the inhibition of protein kinase C and the antagonisation of the altered cell morphology induced by phorbol ester, were comparable to those observed after treatment with sphingosine, a known protein kinase C inhibitor. We conclude that one possible mechanism of the antineoplatic action of hexadecylphosphocholine is mediated by inhibition of protein kinase C.</p></div>","PeriodicalId":11925,"journal":{"name":"European Journal of Cancer and Clinical Oncology","volume":"27 12","pages":"Pages 1650-1653"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0277-5379(91)90438-J","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12944435","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":"A population-based series of 10 male breast cancer cases","authors":"A.J. Sasco , B. Fontanière","doi":"10.1016/0277-5379(91)90456-N","DOIUrl":"10.1016/0277-5379(91)90456-N","url":null,"abstract":"","PeriodicalId":11925,"journal":{"name":"European Journal of Cancer and Clinical Oncology","volume":"27 12","pages":"Page 1713"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0277-5379(91)90456-N","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12829924","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}
William Arcese , Francesca Romana Mauro , Maria Screnci , Giuliana Alimena , Francesco Lo Coco , Anna Paola Iori , Maria Rosa de Cuia , Paola Fazi , Enrico Montefusco , Franco Mandelli
{"title":"Interferon therapy for Ph1-positive chronic myelogenous leukaemia patients relapsing after T-cell depleted allogeneic bone marrow transplantation","authors":"William Arcese , Francesca Romana Mauro , Maria Screnci , Giuliana Alimena , Francesco Lo Coco , Anna Paola Iori , Maria Rosa de Cuia , Paola Fazi , Enrico Montefusco , Franco Mandelli","doi":"10.1016/0277-5379(91)90564-T","DOIUrl":"10.1016/0277-5379(91)90564-T","url":null,"abstract":"","PeriodicalId":11925,"journal":{"name":"European Journal of Cancer and Clinical Oncology","volume":"27 ","pages":"Pages S28-S30"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0277-5379(91)90564-T","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12961602","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}
Antoine Broustet , Josy Reiffers , Gérald Marit , Denis Fiere , Jérôme Jaubert , Jacqueline Reynaud , Jacques Pris , Philippe Bernard , Christine Charrin , Zong Qi Wen , Marie Françoise Berteas , Nicole Dastugue , Yolaine Parlier
{"title":"Hydroxyurea versus interferon alfa-2b in chronic myelogenous leukaemia: Preliminary results of an open French multicentre randomized study","authors":"Antoine Broustet , Josy Reiffers , Gérald Marit , Denis Fiere , Jérôme Jaubert , Jacqueline Reynaud , Jacques Pris , Philippe Bernard , Christine Charrin , Zong Qi Wen , Marie Françoise Berteas , Nicole Dastugue , Yolaine Parlier","doi":"10.1016/0277-5379(91)90558-U","DOIUrl":"10.1016/0277-5379(91)90558-U","url":null,"abstract":"<div><p>In order to compare the effects of interferon versus hydroxyurea for the treatment of chronic myelogenous leukaemia (CML), 58 CML patients, having received no previous treatment, were randomized into two treatment groups (hydroxyurea or interferon) for an open multicentre study from 1 May 1987 until 1 July 1990. Fifty patients were evaluable: 24 in the interferon group and 26 in the hydroxyurea group. Haematological response was obtained in <span><math><mtext>16</mtext><mtext>24</mtext></math></span> interferon-treated patients and <span><math><mtext>23</mtext><mtext>26</mtext></math></span> hydroxyurea patients. Failure to obtain haematological remissions occurred in eight of 24 interferon-treated patients and in three of 26 hydroxyurea patients. Four interferon-treated patient failures and one hydroxyurea-treated failure were due to drug intolerance. Progression occurred in one interferon-treated patient and in three patients given hydroxyurea. Fourteen of 16 patients in the interferon group and <span><math><mtext>17</mtext><mtext>23</mtext></math></span> in the hydroxyurea group continue on study and show no progression.</p></div>","PeriodicalId":11925,"journal":{"name":"European Journal of Cancer and Clinical Oncology","volume":"27 ","pages":"Pages S18-S21"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0277-5379(91)90558-U","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12962476","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}
Monalill Lundqvist , Joachim Mark , Keiko Funa , Nils-Erik Heldin , George Morstyn , Barbro Wedell , Judy Layton , Kjell Öberg
{"title":"Characterisation of a cell line (LCC-18) from a cultured human neuroendocrine-differentiated colonic carcinoma","authors":"Monalill Lundqvist , Joachim Mark , Keiko Funa , Nils-Erik Heldin , George Morstyn , Barbro Wedell , Judy Layton , Kjell Öberg","doi":"10.1016/0277-5379(91)90441-F","DOIUrl":"10.1016/0277-5379(91)90441-F","url":null,"abstract":"<div><p>A cell line (LCC-18) from a neuroendocrine colonic tumour was established. The tumour cells retained their endocrine characteristics through more than 100 passages and showed positive immunocytochemistry for synapthophysin, vasoactive intestinal polypeptide (VIP) and glucagon. The culture medium also contained VIP and glucagon, which indicates that mechanisms for release of some of the active peptides were preserved. Transplantation of LCC-18 tumour cells into nude rats resulted in tumour formation with similar endocrine characteristics. The c-<em>myc</em> gene was amplified which might have been a prerequisite for establishment of the cell line. The chromosomes in LCC-18 were studied by G-banding and C-banding. The cell line had a distinctive mode in the hypotriploid region, at S=61. The double minute (Dms) positive stemline karyotype showed numerical and structural aberrations more similar to findings in ordinary colonic adenocarcinomas than to observations in previously studied, pure intestinal neuroendocrine tumours. The Dms may be correlated with amplification of c-<em>myc</em>. LCC-18 may become valuable for studies of neuroendocrine differentiation, regulation of growth and production and release of hormones and for studies of drug effect.</p></div>","PeriodicalId":11925,"journal":{"name":"European Journal of Cancer and Clinical Oncology","volume":"27 12","pages":"Pages 1663-1668"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0277-5379(91)90441-F","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12944436","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}
S.M. Scholl , B. Asselain , T. Palangie , T. Dorval , M. Jouve , E. Garcia Giralt , J. Vilcoq , J.C. Durand , P. Pouillart
{"title":"Neoadjuvant chemotherapy in operable breast cancer","authors":"S.M. Scholl , B. Asselain , T. Palangie , T. Dorval , M. Jouve , E. Garcia Giralt , J. Vilcoq , J.C. Durand , P. Pouillart","doi":"10.1016/0277-5379(91)90442-G","DOIUrl":"10.1016/0277-5379(91)90442-G","url":null,"abstract":"<div><p>Primary chemotherapy in localised breast cancer may prevent tumour spread during surgical treatment and reduce proliferation of micrometastases. A randomised clinical trial, in 196 premenopausal and postmenopausal patients with operable (T2-3, N0-1b) breast cancer, was started in November 1983 at the Institut Curie to compare neoadjuvant and adjuvant regimens of chemotherapy with radiotherapy with or without surgery. The patients have been followed up for 35–70 months (median 54). A neoadjuvant group received two monthly cycles of intravenous doxorubicin/cyclophosphamide/5-fluorouracil before locoregional therapy and four cycles subsequently. Six months cycles following locoregional therapy were administered to the adjuvant group. Because of inclusion of postmenopausal and/or node-negative patients, compliance was less than optimal in 39 patients who were analysed separately according to actual dose received. Tumour response, evaluated after two cycles of neoadjuvant chemotherapy, was significantly associated with dose (<em>P</em> = 0.003). Survival showed a slight non-significant advantage for the neoadjuvant group. Survival plotted by actual dose was also similar. Neoadjuvant chemotherapy was safe and at least as effective as the adjuvant regimen. Patients have been accrued to a subsequent larger trial of chemotherapy as first-line treatment.</p></div>","PeriodicalId":11925,"journal":{"name":"European Journal of Cancer and Clinical Oncology","volume":"27 12","pages":"Pages 1668-1671"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0277-5379(91)90442-G","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12944437","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}