1. Department of Urology, The First Affiliated Hospital of Shandong First Medical University and Shandong Provincial Qianfoshan Hospital, Jinan, Shandong 250014, P.R. China
2. Nursing Department, Affiliated Eye Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250001, P.R. China
3. Department of Pathology, The First Affiliated Hospital of Shandong First Medical University and Shandong Provincial Qianfoshan Hospital, Jinan, Shandong 250014, P.R. China