1. Nephrology Department; Hospital Universitari de Bellvitge; University of Barcelona; IDIBELL; L'Hospitalet de Llobregat Spain
2. Urology Department; Hospital Universitari de Bellvitge; L'Hospitalet de Llobregat Spain
3. Statistical Advisory Service; Bellvitge Biomedical Institute-IDIBELL; Faculty of Medicine and Health Sciences; University Rovira i Virgili; L'Hospitalet de Llobregat Spain