[1] Toho Univ, Sakura Med Ctr, Dept Internal Med, Div Gastroenterol & Hepatol, 564-1 Shimoshizu, Sakura, Chiba 2858741, Japan
[2] Kyoto Univ, Grad Sch Med, Dept Community Med, Sect Clin Epidemiol, Kyoto, Japan
[3] Tokyo Med & Dent Univ, Dept Gastroenterol & Hepatol, Tokyo, Japan
[4] Kitasato Univ, Kitasato Inst Hosp, Ctr Adv IBD Res & Treatment, Tokyo, Japan
[5] Tokyo Womens Med Univ, Inst Gastroenterol, Tokyo, Japan
[6] Keio Univ, Sch Med, Dept Internal Med, Div Gastroenterol & Hepatol, Tokyo, Japan
[7] Osaka Univ, Grad Sch Med, Dept Gastroenterol & Hepatol, Osaka, Japan
[8] Jikei Univ, Sch Med, Dept Internal Med, Div Gastroenterol & Hepatol, Tokyo, Japan
[9] Kyorin Univ, Sch Med, Dept Gastroenterol & Hepatol, Tokyo, Japan
[10] Inflammatory Bowel Dis Ctr, Mie, Japan
[11] Yokkaichi Hazu Med Ctr, Dept Surg, Yokaichi, Mie, Japan
[12] Sapporo Kosei Gen Hosp, Inflammatory Bowel Dis Ctr, Sapporo, Hokkaido, Japan
[13] Tokyo Med & Dent Univ, Adv Res Inst, Tokyo, Japan
[14] Takeda Pharmaceut Co Ltd, Japan Med Off, Tokyo, Japan
[15] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Hlth Policy Management, Maryland, NY USA
[16] Hyogo Med Univ, Dept Internal Med, Div Gastroenterol & Hepatol, Nishinomiya, Hyogo, Japan