Skolarikos A, Grivas N, Kallidonis P, Mourmouris P, Rountos T, Fiamegos A, Stavrou S, Venetis C; Members of RISTA Study Group.
Second Department of Urology, Athens Medical School, Sismanogleio General Hospital, Athens, Greece.
Department of Urology, G. Hatzikosta General Hospital, Ioannina, Greece.
Department of Urology, University of Patras, Patras, Greece.
Department of Urology, Ippokrateio General Hospital, Thessaloniki, Greece.
Department of Urology, University of Ioannina, Ioannina, Greece.
First Department of Obstetrics and Gynaecology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece.

Tauber V, Wohlmuth M, Hochmuth A, Schimetta W, Krause FS.
Department of Urology, AKh Linz, Medical Faculty, Linz, Austria.

Aydin HR, Irkilata L, Aydin M, Daggulli M, Taskin MH, Demirel HC, Adanur S, Moral C, Atilla MK, Sancaktutar AA.
Department of Urology, Recep Tayyip Erdoğan University , Rize, Turkey.
Department of Urology, Samsun Training and Research Hospital , Samsun, Turkey.
Department of Urology, Dicle University , Diyarbakir, Turkey.
Department of Microbiology, Samsun Training and Research Hospital , Samsun, Turkey.
Department of Urology, Ataturk University , Erzurum, Turkey.

Dogan HS, Altan M, Citamak B, Bozaci AC, Karabulut E, Tekgul S.
Department of Urology, Hacettepe University Faculty of Medicine, Ankara, Turkey.
Department of Biostatistics, Hacettepe University Faculty of Medicine, Ankara, Turkey.

Cranfield A, Mathavakkannan S.
The Renal Unit, Lister Hospital Stevenage, Hertfordshire, SG1 4AB, UK.