[1] Chinese Univ Hong Kong, Dept Med & Therapeut, Hong Kong, Peoples R China
[2] Chinese Univ Hong Kong, Inst Digest Dis, Dept Med & Therapeut, MDAC, Hong Kong, Peoples R China
[3] Chinese Univ Hong Kong, Hong Kong, Peoples R China
[4] Chinese Univ Hong Kong, Inst Digest Dis, Hong Kong, Peoples R China