1. Department of Gynecology and Obstetrics, Nantong Haimen People's Hospital, Haimen, Jiangsu 226100, P.R. China
2. Department of Neurology, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, Jiangsu 210004, P.R. China
3. Department of Endocrinology, The Air Force Hospital from Eastern Theater of PLA, Nanjing, Jiangsu 210029, P.R. China