1 University Hospital for Urology, Klinikum Oldenburg, School of Medicine and Health Sciences, Carl von Ossietzky University Oldenburg, Oldenburg, Germany.
2 Department of Urology, Lukas Hospital, Neuss, Germany.
3 Department of Urology, Uppsala University, Uppsala, Sweden.
4 University of Chengdu, Chengdu, China.
5 Department of Urology, HELIOS Hospital, Bad Saarow, Germany.