Veld JV, van Huijgevoort NCM, Boermeester MA, Besselink MG, van Delden OM, Fockens P, van Hooft JE.
Department of Gastroenterology and Hepatology, Department of Surgery, Department of Interventional Radiology, Amsterdam Gastroenterology and Metabolism, Academic Medical Center, Amsterdam, the Netherlands.

Fankhauser CD, Hermanns T, Lieger L, Diethelm O, Umbehr M, Luginbühl T, Sulser T, Müntener M, Poyet C.
Department of Urology, University Hospital, University of Zurich, Zurich, Switzerland.
Department of Urology, City Hospital Triemli of Zurich, Zurich, Switzerland.
Department of Urology, Spital Uster, Uster, Switzerland.

Gadzhiev N, Gorelov D, Smirnov A, Al-Shukri S, Petrov S.
Department of Urology, Department of Endoscopy, Pavlov First Saint Petersburg State Medical University, Saint-Petersburg, Russia.
Department of Urology, The Nikiforov Russian Center of Emergency and Radiation Medicine, Saint-Petersburg, Russia.

Choo MS, Uhmn S, Kim JK, Han JH, Kim DH, Kim J, Lee SH.
Department of Urology, Hallym University Dongtan Sacred Heart Hospital, Hwaseong-si, Geonggi-do, Republic of Korea; Department of Computer Engineering, Hallym University (SU, DHK, JK), Chuncheon, Gangwon-do, Republic of Korea.

Proietti S, Somani BK, Pietropaolo A, Saitta G, Rodríguez-Socarrás ME, Rosso M, Bellinzoni P, Gaboardi F, Giusti G.
Urology Department, IRCCS San Raffaele Scientific Institute, Ville Turro Division, Milan, Italy.
Department of Urology, University Hospital Southampton NHS Trust, Southampton, United Kingdom.