[1] Hosp Univ Bellvitge, Nephrol, LHospitalet De Llobregat, Spain
[2] Univ Hosp Birmingham, Nephrol & Transplantat, Birmingham, England
[3] Med Univ Vienna, Clin Div Nephrol & Dialysis, Internal Med 3, Vienna, Austria
[4] Univ Tubingen, Diabetol, Endocrinol, Nephrol, Tubingen, Germany
[5] Biomed Res Inst IDIBELL, Nephrol & Transplantat, Lhospitalet De Llobregat, Spain
[6] Hosp 12 Octubre, Nephrol, Madrid, Spain