1. Department of Obstetrics and Gynecology, Huangjiahu Hospital, Hubei University of Chinese Medicine, Wuhan, Hubei 430065, P.R. China
2. China Key Laboratory of TCM Resource and Prescription, Hubei University of Chinese Medicine, Ministry of Education, Wuhan, Hubei 430065, P.R. China
3. Department of Gastrointestinal Surgery, Jingzhou Central Hospital, Jingzhou, Hubei 434020, P.R. China