1. Department of Urology; Cipto Mangunkusumo Hospital; University of Indonesia School of Medicine; Jakarta Indonesia
2. Division of Surgery; Department of Urology & Urological Oncology; Hannover Medical School; Hannover Germany
3. Urological Research Unit; Institute for Biochemical Research & Analysis; Barsinghausen am Deister Germany
4. Department of Urology; AGAPLESION St. Markus Hospital, Frankfurt am Main; Germany