[1] Chinese Univ Hong Kong, Prince Wales Hosp, Inst Digest Dis, Shatin, Hong Kong, Peoples R China
[2] Asia Pacific Working Grp, Dept Med & Therapeut, Shatin, Hong Kong, Peoples R China
[3] Natl Univ Singapore Hosp, Dept Med, Asia Pacific Working Grp, Singapore, Singapore
[4] Univ Wisconsin, Aurora Summit Med Ctr, Summit, NJ USA
[5] Univ Malaya, Kuala Lumpur, Malaysia
[6] Asian Inst Gastroenterol, Hyderabad, Andhra Pradesh, India