1. Department of Urology; Gunma University Graduate School of Medicine; Maebashi; Japan
2. Department of Pathology; Tohoku University Graduate School of Medicine; Aoba-ku; Sendai; Japan
3. Division of Urology; Kiryu Kosei General Hospital; Kiryu; Japan
4. Division of Pharmacological Research; Aska Pharma Medical Co. Ltd.; Takatsu-ku; Kawasaki; Japan
5. Department of Medicine and Molecular Science; Gunma University Graduate School of Medicine; Maebashi; Japan