1. Department of Urology, The First Affiliated Hospital of Anhui Medical University, Institute of Urology, Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei, PR China
2. Department of Health Examination Center, The First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei, PR China
3. Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, PR China