1 Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong Special Administrative Region; Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong Special Administrative Region.
2 Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong Special Administrative Region; Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong Special Administrative Region; State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong Special Administrative Region.
3 Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong Special Administrative Region; Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong Special Administrative Region; State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong Special Administrative Region. Electronic address: wonglaihung@cuhk.edu.hk.