1. Urology Department, Jules Bordet Institute, Université libre de Bruxelles, Brussels, Belgium;
2. Urology Department, University Clinics of Brussels, Erasme Hospital, Université libre de Bruxelles, Brussels, Belgium;
3. Urology Department, Institut de Recherche clinique (IREC), Cliniques universitaires St Luc, Université catholique de Louvain, Brussels, Belgium