[1] Ng Teng Fong Gen Hosp NUHS, Dept Urol, Singapore 609606, Singapore
[2] Sorbonne Univ, Tenon Hosp, AP HP, Dept Urol, F-75020 Paris, France
[3] Seoul Natl Univ Hosp, Dept Urol, Seoul 02841, South Korea
[4] Chinese Univ Hong Kong, Dept Surg, SHHo Urol Ctr, Hong Kong 999077, Peoples R China
[5] Global Indian Int Sch, Singapore 828649, Singapore
[6] Biruni Univ, Dept Urol, Med Sch, TR-34010 Istanbul, Turkey
[7] Univ Hosp Southampton NHS Trust, Dept Urol, Southampton SO16 6YD, Hants, England
[8] Univ Politecn Marche, Urol Unit, Azienda Osped, Univ Osped Riuniti Ancona, I-60126 Ancona, Italy