1 Urologische Praxis und Steinzentrum, Vienna, Austria. Electronic address: office@tuerk.at.
2 Department of Urology, Sindelfingen-Böblingen Medical Center, University of Tübingen, Sindelfingen, Germany.
3 Department of Urology, Region Hospital, Ceske Budejovice, Czechia; Department of Urology, First Faculty of Medicine, Charles University in Prague, Prague, Czechia.
4 Department of Urology, Health Sciences University, Dr. Lutfi Kirdar Kartal Research and Training Hospital, Istanbul, Turkey.
5 Department of Urology, Medical University Vienna, Vienna, Austria.
6 Second Department of Urology, Sismanoglio Hospital, National and Kapodistrian University of Athens, Athens, Greece.