title: Reply.
authors.affiliation: Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong.|Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong.
authors.forename: Jenny Yeuk-Ki
authors.initials: JY
authors.lastname: Cheng
authors.affiliation: Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong.|Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong.
authors.forename: Yee-Kit
authors.initials: YK
authors.lastname: Tse
authors.affiliation: Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong.|Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong.|State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong.
authors.forename: Grace Lai-Hung
authors.initials: GL
authors.lastname: Wong