1. Department of Urology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, 400042, PR China
2. Department of Bio-Medical Sciences, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, 19131, USA
3. Department of Pathology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, 400042, PR China