Müllhaupt G, Engeler DS, Schmid HP, Abt D.
Department of Urology, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.

Omar M, Tarplin S, Brown R, Sivalingam S, Monga M.
Stevan Streem Center for Endourology and Stone Disease, Glickman Urology and Kidney Institute, The Cleveland Clinic, 9500 Euclid Avenue, Q10-1, Cleveland, OH, 44195, USA.

Zheng C, Yang H, Luo J, Xiong B, Wang H, Jiang Q.
Department of Urology, The People's Hospital of Bishan District, Bishan, Chongqing, 402760, China.
Department of Urology, Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China.

Lee FC, Hsi RS, Sorensen MD, Dunmire B, Liu Z, Bailey MR, Harper JD.
Department of Urology, University of Washington School of Medicine , Seattle, Washington.
Division of Urology, Department of Veteran Affairs Medical Center , Seattle, Washington.
Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington , Seattle, Washington.
Department of Biostatistics, Indiana University Schools of Medicine and Public Health , Indianapolis, Indiana.

Burr J, Ishii H, Simmonds N, Somani BK.
University Hospital Southampton NHS Trust, Department of Urology, Southampton, United Kingdom.