[1] Ctr Hosp Tras os Montes Alto Douro CHTMA, Nephrol, Vila Real, Portugal
[2] Ctr Hosp Univ Porto, Nephrol, Porto, Portugal
[3] Ctr Hosp Medio Tejo, Nephrol, Torres Novas, Portugal
[4] Univ Porto, Unit Multidisciplinary Res Biomed, Inst Ciencias Biomed Abel Salazar, Porto, Portugal
[5] Hosp Garcia Orta, Nephrol, Almada, Portugal