[1] Tokyo Womens Med Univ, Adachi Med Ctr, Dept Clin Lab & Endoscopy, 4-33-1 Kohoku,Adachi Ku, Tokyo 1238558, Japan
[2] Junshin Gakuen Univ, Fukuoka, Japan
[3] Kitakyushu Chuou Hosp, Kitakyushu, Japan
[4] Osaka Metropolitan Univ, Grad Sch Med, Dept Publ Hlth, Osaka, Japan
[5] Miyagi Childrens Hosp, Dept Surg, Sendai, Miyagi, Japan
[6] Kitasato Univ, Sch Med, Dept Gastroenterol, Internal Med, Sagamihara, Japan
[7] Nippon Med Sch, Dept Gastrointestinal & Hepatobiliary Pancreat Sur, Tokyo, Japan
[8] Natl Ctr Global Hlth & Med, Res Ctr Hepatitis & Immunol, Chiba, Japan
[9] NHO Kokura Med Ctr, Dept Clin Lab, Kitakyushu, Japan
[10] Kyushu Univ, Grad Sch Med Sci, Dept Emergency Med, Fukuoka, Japan
[11] Fukushima Preservat Serv Assoc Hlth, Endoscopy Ctr, Fukushima, Japan
[12] Kitakyushu Koga Hosp, Fukuoka, Japan
[13] URASOE Gen Hosp, Dept Cardiovasc Surg, Urasoe, Okinawa, Japan
[14] Kurume Univ, Sch Med, Dept Med, Div Gastroenterol, Kurume, Japan
[15] Juntendo Univ, Nerima Hosp, Dept Gastroenterol, Tokyo, Japan
[16] Yamaguchi Univ, Grad Sch Med, Dept Gastroenterol & Hepatol, Yamaguchi, Japan
[17] Ehime Univ Hosp, Total Med Support Ctr, Matsuyama, Ehime, Japan
[18] Yale Univ, Sch Med, Dept Internal Med, Sect Digest Dis, New Haven, CT USA
[19] Tohoku Univ, Grad Sch Med, Dept Pediat Surg, Sendai, Japan
[20] Teikyo Univ, Sch Med, Dept Med, Tokyo, Japan