[1] Univ Helsinki, Helsinki, Finland
[2] Lund Univ, Dept Clin Sci, Genom Diabet & Endocrinol, Malmo, Sweden
[3] NYU, Dept Med, Div Diabet Endocrinol & Metab, 550 1St Ave, New York, NY 10016 USA
[4] Univ Helsinki, Helsinki Univ Cent Hosp, Abdominal Ctr, Endocrinol, Helsinki, Finland
[5] Folkhalsan Res Ctr, Helsinki, Finland