1. Department of Urology, San Raffaele Hospital, Ville Turro Division, Milan, Italy.
2. Department of Urology, Hôpital Tenon, Université Pierre et Marie Curie - Paris, Paris, France.
3. Department of Urology, East Surrey Hospital, Surrey and Sussex Healthcare NHS, Redhill, United Kingdom.
4. Urology, University Hospital Southampton NHS Trust, Southampton, United Kingdom.
5. Department of Human Pathology, Unit of Urology, University of Messina, Messina, Italy.
6. Department of Urology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy.
7. Department of Urology, Fundacion Puigvert Universitat Autonoma de Barcelona, Barcelona, Spain.
8. Department of Urology, GRC Lithiase (Groupe Recherche Clinique), Université Pierre et Marie Curie - Paris VI, Paris, France.