1. Department of Gynecology, Second People's Hospital of Jingmen, Jingmen, Hubei 448000, P.R. China
2. Department of Orthopedics, Second People's Hospital of Jingmen, Jingmen, Hubei 448000, P.R. China
3. Department of Gynecology, Maternal and Child Health Hospital of Jingmen, Jingmen, Hubei 448000, P.R. China