[1] Biomedicum Helsinki, Folkhalsan Res Ctr, Folkhalsan Inst Genet, Helsinki, Finland
[2] Univ Helsinki, Cent Hosp, Dept Med, Div Nephrol, FIN-00014 Helsinki, Finland
[3] Univ Pavia, IRCCS Policlin S Matteo, Dept Internal Med, Pavia, Italy
[4] Baker IDI Heart & Diabet Inst, Melbourne, Australia