1. School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, SAR 999077, P.R. China
2. Division of General Practice, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
3. Department of Neurology, The First Affiliated Hospital of Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
4. Department of General Surgery, Bayingol Mongolia Autonomous Prefecture People's Hospital, Urumqi, Xinjiang Uygur Autonomous Region 841300, P.R. China
5. Public Health School, Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
6. Department of Medicine, Sunshine Guojian Pharmaceutical Co., Ltd., Shanghai 201203, P.R. China