1. 1Department of Urology, Ningbo Medical Center Lihuili Hospital, Ningbo, Zhejiang 315000, P.R. China
2. 2Department of Nephrology, Ningbo Medical Center Lihuili Hospital, Ningbo, Zhejiang 315000, P.R. China
3. 3Department of Reproductive Medicine, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang 315000, P.R. China