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[Japanese]."},{"key":"REF5","unstructured":"Yamaguchi T, Saisho H, Ohto M, et al.\n                      Usefulness of percutaneous histological biopsy in the diagnosis of chronic pancreatitis with inflammatory mass (CPM).\n                      J Intervent Radiol\n                      1994; 9:165-170."},{"key":"REF6","doi-asserted-by":"crossref","unstructured":"Kroft SH, Stryker SJ, Winter JN, Ergun G, Rao MS.\n                      Inflammatory pseudotumor of the pancreas.\n                      Int J Pancreatol\n                      1995; 18:277-283.","DOI":"10.1016\/0899-7071(94)90010-8"},{"key":"REF7","doi-asserted-by":"crossref","unstructured":"van Gulik TM, Moojen TM, van Geenen R, Rauws EA, Obertop H, Gouma DJ.\n                      Differential diagnosis of focal pancreatitis and pancreatic cancer.\n                      Ann Oncol\n                      1999; 10:85-88.","DOI":"10.1093\/annonc\/10.suppl_4.S85"},{"key":"REF8","doi-asserted-by":"publisher","DOI":"10.1002\/1097-0142(19871001)60:7<1636::AID-CNCR2820600736>3.0.CO;2-C"},{"key":"REF9","doi-asserted-by":"crossref","unstructured":"Beger HG, Schlosser W, Siech M, Poch B.\n                      The surgical management of chronic pancreatitis: duodenum-preserving pancreatectomy.\n                      Adv Surg\n                      1999; 32:87-104.","DOI":"10.1007\/978-3-642-60068-5_16"},{"key":"REF10","unstructured":"Piantino P.\n                      CA19-9 assay in differential diagnosis of pancreatic carcinoma from inflammatory pancreatic disease.\n                      Am J Gastroenterol\n                      1987; 81:436-439."},{"key":"REF11","doi-asserted-by":"publisher","DOI":"10.1385\/IJGC:25:1:23"},{"key":"REF12","unstructured":"Ishihara T, Yamaguchi T, Tsuyuguchi T, Hayasaka A, Saisho H.\n                      Characteristic findings of endoscopic retrograde pancreatography in the diagnosis of chronic pancreatitis with inflammatory mass.\n                      Nippon Shokakibyo Gakkai Zasshi\n                      1996; 93:725-731. [Japanese]."},{"key":"REF13","unstructured":"Horiguchi Y, Kitano T, Ohsugi M, et al.\n                      Ultrasonic differentiation between inflammatory mass and pancreatic cancer.\n                      Jpn J Med Ultrasonics\n                      1985; 12:310-320. [Japanese]."},{"key":"REF14","unstructured":"Fleiss JL.\n                      Statistical methods for rates and proportions\n                      2nd ed. 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