The Chinese University of Hong Kong (CUHK) - Institute of Digestive Disease, The Chinese University of Hong Kong (CUHK) - Institute of Digestive Disease, The Chinese University of Hong Kong (CUHK) - Institute of Digestive Disease, The Chinese University of Hong Kong (CUHK) - Institute of Digestive Disease, The Chinese University of Hong Kong (CUHK) - Institute of Digestive Disease, The Chinese University of Hong Kong (CUHK) - Institute of Digestive Disease, The Chinese University of Hong Kong (CUHK) - Institute of Digestive Disease, Shanghai Jiao Tong University (SJTU) - Affiliated Sixth People's Hospital and The Chinese University of Hong Kong (CUHK) - State Key Laboratory of Digestive Disease