[1] Internist Fachklin Dr Steger, Philipp Kittler Str 27, D-90480 Nurnberg, Germany
[2] Diabet Zentrum, Essen, Germany
[3] Univ Ulm, Inst Epidemiol & Med Biometry, Ulm, Germany
[4] Heinrich Heine Univ, Leibniz Ctr Diabet Res, German Diabet Ctr DDZ, Inst Clin Diabetol, Dusseldorf, Germany
[5] Heinrich Heine Univ, Med Fac, Div Endocrinol & Diabetol, Dusseldorf, Germany
[6] Worwag Pharma GmbH & Co KG, Boblingen, Germany
[7] InnoDiab Forsch GmbH, Essen, Germany
[8] Univ Michigan, Dept Internal Med, Div Metab Endocrinol & Diabet, Ann Arbor, MI 48109 USA