[1] Coimbra Univ & Hosp Ctr, Nephrol, Coimbra, Portugal
[2] Univ Coimbra, Nephrol Univ Clin, Fac Med, Coimbra, Portugal
[3] Univ Coimbra, Fac Med, Biostatist Lab & Med Informat, Coimbra, Portugal
[4] Hosp Amato Lusitano, Nephrol, Castelo Branco, Portugal
[5] Coimbra Univ & Hosp Ctr, Urol, Coimbra, Portugal