1. Department of Pathology, Tangdu Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China
2. Department of Pathology, Hainan Branch of General Hospital of the Chinese People's Liberation Army, Sanya, Hainan 572013, P.R. China
3. Department of Gynaecology and Obstetrics, Baoji Central Hospital, Baoji, Shaanxi 721008, P.R. China
4. Department of Clinical Laboratory, Tangdu Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China
5. Department of Orthopedics, Tangdu Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China
6. Research Service Office, Tangdu Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China