1. Department of Urology and Pathology, Harvard Medical School, Massachusetts General Hospital, Boston, MA, USA;
2. Department of Urology, First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China;
3. Department of Pathology, Peking University Third Hospital, Peking University Health Science Center, Beijing, China;
4. Division of Urologic Surgery, Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, MA, USA