1. Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, Sichuan Province, P.R. China
2. Department of Stomatology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, Sichuan Province, P.R. China
3. Department of Gynaecology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, Sichuan Province, P.R. China
4. Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi Province, P.R. China