[1] Univ Basel, Univ Basel Hosp, Dept Urol, CH-4031 Basel, Switzerland
[2] Kings Coll Hosp London, Dept Urol, London, England
[3] Calif Urol Serv, San Francisco, CA USA
[4] Cornell Univ, Weill Med Coll, Dept Urol, New York, NY 10021 USA
[5] Massachusetts Gen Hosp, Dept Urol, Boston, MA 02114 USA
[6] Univ Munich, Harlaching Hosp, Dept Urol, Munich, Germany
[7] Inst Adv Urol Surg, Madrid, Spain
[8] Univ Sydney, Sydney Adventist Hosp Clin Sch, Sydney, NSW 2006, Australia