[1] Vall dHebron Hosp, Dept Urol, Barcelona, Spain
[2] Univ Automoma Barcelona, Dept Surg, Barcelona, Spain
[3] Parc Salut Mar, Dept Urol, Barcelona, Spain
[4] Univ Pompeu Fabra, Dept Comunicac, Barcelona, Spain
[5] Germans Trias i Pujol Hosp, Dept Urol, Badalona, Spain
[6] Univ Automoma Barcelona, Barcelona, Spain