Name: Saburo Matsubara, M.D. and Ph.D. Department of Gastroenterology and Hepatology, Saitama Medical Center, Saitama Medical University. Title: Associate Professor. Education: 1993–1999 Kanazawa University School of Medicine, awarded M.D. 1999–2000 University of Tokyo Hospital, resident of internal medicine. 2000–2003 Saitama Red Cross Hospital, senior resident of internal medicine. 2003–2008 Post-graduate School, University of Tokyo, awarded Ph.D. Professional experience: 2003–2005 University of Tokyo Hospital, Dept. of Gastroenterology. 2005–2007 JR Tokyo General Hospital, Dept. of Gastroenterology. 2007–2008 University of Tokyo Hospital, Dept. of Gastroenterology. 2008–2010 Kanto Central Hospital, Dept. of Gastroenterology. 2010–2014 Tokyo Metropolitan Police Hospital, Dept. of Gastroenterology. 2014–2017 Assistant Professor, department of Gastroenterology, Graduate School of Medicine, University of Tokyo. 2017–present Associate Professor, department of Gastroenterology and Hepatology, Saitama Medical Center, Saitama Medical University. Certification: Medical doctor. Authorized doctor, Japanese Society of Internal Medicine. Authorized doctor, Japanese Society of Gastroenterology. Authorized doctor, Japan Gastroenterological Endoscopy Society. Authorized doctor, Japanese Board of Cancer Therapy. Authorized doctor, Japan Biliary Association. Authorized doctor, Japan Pancreas Society.