1. University Department of Urology, Sismanoglio Hospital, Athens, Greece
2. Department of Urology, Nikaia Hospital, Pireaus, Greece
3. Department of Urology, The City Hospital, Dubai, United Arab Emirates
4. Department of Urology, Barts and The London NHS Trust, London, UK
5. EAU Section of Urolithiasis Urological Research Center, Department of Urology, University of Southern Denmark Fredericia, Denmark