title: Author Reply.
authors.affiliation: Department of Renal, Urological and Infectious Diseases, Centro Hospitalar de São João, Porto, Portugal; Department of Urology, Centro Hospitalar do Tâmega e Sousa, Penafiel, Portugal.
authors.forename: Pedro
authors.initials: P
authors.lastname: Valente
authors.affiliation: Faculty of Medicine, University of Porto, Porto, Portugal.
authors.forename: Carolina
authors.initials: C
authors.lastname: Gomes
authors.affiliation: Department of Renal, Urological and Infectious Diseases, Centro Hospitalar de São João, Porto, Portugal; Faculty of Medicine, University of Porto, Porto, Portugal.
authors.forename: Nuno
authors.initials: N
authors.lastname: Tomada