[1] Ulm Univ, Inst Epidemiol & Med Biometry, Zibmt, Ulm, Germany
[2] Childrens Hosp, Sana Klinikum Lichtenberg, Berlin, Germany
[3] Childrens Hosp, Clin Ctr Chemnitz, Chemnitz, Germany
[4] Heinrich Heine Univ Dusseldorf, Dept Pediat, Dusseldorf, Germany
[5] Med Univ Vienna, Dept Pediat & Adolescent Med, Vienna, Austria
[6] Clin Ctr Hanau, Clin Children & Adolescent Med, Hanau, Germany
[7] AKK Altonaer Kinderkrankenhaus, Dept Paediat Endocrinol, Hamburg, Germany
[8] St Marien Hosp Landshut, Dept Pediat, Landshut, Germany
[9] Childrens & Youth Hosp Auf Der Bult, Diabet Ctr Children & Adolescents, Hannover, Germany