1 School of Nursing, Jinan University, Guangzhou, Guangdong, China.
2 Bariatric Unit, Sunderland Royal Hospital, Sunderland, UK.
3 Department of Surgery, Whittington Hospital, London, UK.
4 University College London Medical School, UK.
5 Department of Metabolic and Bariatric Surgery, the First Affiliated Hospital, Jinan University, Guangzhou, China.
6 Joint Institute of Metabolic Medicine Between State Key Laboratory of Pharmaceutical Biotechnology, the University of Hong Kong and Jinan University, Guangzhou, China.
7 State Key Laboratory of Pharmaceutical Biotechnology, LKS Faculty of Medicine, the University of Hong Kong, Hong Kong, China.
8 Department of Medicine, LKS Faculty of Medicine, the University of Hong Kong, Hong Kong, China .