1. Department of Gastroenterology, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, Guangdong 510080, China
2. Department of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
3. Department of Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, China
4. Guangdong Metabolic Diseases Research Centre of Integrated Chinese and Western Medicine, Joint Laboratory of Guangdong Province and Hongkong and Macao Regions on Metabolic Diseases, Guangdong Pharmaceutical University, Guangzhou 510006, China