1. Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
2. Shantou Health School, Shantou, Guangdong Province 515061, China
3. Yunnan University of Chinese Medicine, Kunming, Yunnan Province 650500, China
4. Kunming Municipal Hospital of Traditional Chinese Medicine, Kunming, Yunnan Province 650011, China