1. Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China
2. Department of Oncology Surgery, Tangshan People’s Hospital, Tangshan, Hebei, China
3. Department of Gynaecology, Tangshan Hongci Hospital, Tangshan, Hebei, China
4. Health Department of Kailuan (Group), Tangshan, Hebei, China