[1] Karolinska Inst, Karolinska Univ Hosp, Dept Med Solna, SE-17176 Stockholm, Sweden
[2] Uppsala Unvers, Sci Life Lab, Dept Med Sci, Uppsala, Sweden
[3] Uppsala Univ, Dept Med Sci, Uppsala, Sweden
[4] Uppsala Univ, Womens & Childrens Hlth, Uppsala, Sweden
[5] Uppsala Univ, Immunol Genet & Pathol, Uppsala, Sweden
[6] Univ Copenhagen, Dept Cellular & Mol Med, Copenhagen, Denmark
[7] Helsinki Univ Hosp, Dept Pathol, Helsinki, Finland
[8] Univ Helsinki, Helsinki, Finland
[9] Tampere Univ Hosp, Sch Med, Dept Med, Tampere, Finland
[10] Lund Univ, Dept Nephrol, Lund, Sweden
[11] Univ Bergen, Dept Clin Sci, Bergen, Norway
[12] Haukeland Hosp, Dept Med, Bergen, Norway
[13] Univ Calif San Francisco, Ctr Diabet, San Francisco, CA 94143 USA
[14] Univ Helsinki, Hosp Children & Adolescents, Helsinki, Finland
[15] Aarhus Univ, Dept Biomed, Interact Prot Epithelial Transport Ctr, Aarhus, Denmark