1. School of Chinese Medicine, School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, P.R. China
2. Department of Laboratory of Diabetes, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, P.R. China
3. School of Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, P.R. China