1. Division of Urology, Southern Illinois University School of Medicine, Springfield, Illinois
2. Division of Urology, Department of Surgery and Department of Microbiology and Immunology, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada
3. Department of Urology, West China Hospital, Sichuan University, West China School of Clinical Medicine, Sichuan University, Chengdu, China
4. Department of Urology, North Manchester General Hospital, Manchester, United Kingdom