[1] Natl Univ Singapore, Yong Loo Lin Sch Med, Dept Med, Singapore 117548, Singapore
[2] Sanjay Gandhi Postgrad Inst Med Sci, Dept Gastroenterol, Lucknow, Uttar Pradesh, India
[3] Chulalongkorn Univ, Fac Med, Dept Med, GI Motil Res Unit,Div Gastroenterol, Bangkok 10330, Thailand
[4] Gastro Ctr Ipoh, Dept Primary Care & Gastroenterol, Ipoh, Perak, Malaysia
[5] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Gastroenterol, Seoul, South Korea
[6] Univ Kelaniya, Fac Med, Ragama, Sri Lanka
[7] Catholic Univ Korea, Seoul St Marys Hosp, Dept Internal Med, Div Gastroenterol, Seoul, South Korea
[8] Chinese Univ Hong Kong, Inst Digest Dis, Hong Kong, Hong Kong, Peoples R China
[9] Sun Yat Sen Univ, Dept Gastroenterol & Hepatol, Affiliated Hosp 1, Guangzhou 510275, Guangdong, Peoples R China
[10] Natl Yang Ming Univ Taipei, Taipei Vet Gen Hosp, Div Gastroenterol, Taipei, Taiwan
[11] Natl Yang Ming Univ Taipei, Inst Brain Sci, Taipei, Taiwan
[12] Buddhist Tzu Chi Gen Hosp, Dept Med, Hualien, Taiwan
[13] Tzu Chi Univ, Hualien, Taiwan
[14] Asian Inst Gastroenterol, Hyderabad, Andhra Pradesh, India
[15] PD Hinduja Natl Hosp, Bombay, Maharashtra, India
[16] MRC, Bombay, Maharashtra, India
[17] Huazhong Univ Sci & Technol, Tongji Med Coll, Union Hosp, Dept Gastroenterol & Hepatol, Wuhan 430074, Hubei, Peoples R China
[18] Chinese Acad Med Sci, Peking Union Med Coll, Dept Gastroenterol, Beijing 100730, Peoples R China
[19] Med Ctr Manila, Dept Internal Med, Gastroenterol Sect, Manila, Philippines
[20] Univ Indonesia, Fac Med, Cipto Mangunkusumo Gen Hosp, Div Gastroenterol,Dept Internal Med, Jakarta, Indonesia