1. The Stone Centre at Vancouver General Hospital, Department of Urologic Sciences, University of British Columbia, Vancouver, Canada.
2. Department of Urology, University Hospital Carl Gustav Carus, TU Dresden, Dresden, Germany.
3. Department of Urology, King Abdulaziz University Hospital, Jeddah, Saudi Arabia.
4. Department of Urology, Yonsei University College of Medicine, Seoul, Korea.
5. Department of Urology, Marien Hospital Herne, Ruhr-University of Bochum, Herne, Germany.