1. Department of Pediatric and Adolescent Medicine; University of Cologne; Cologne Germany
2. Department of Pediatric and Adolescent Medicine; Elisabeth-Hospital Essen; Essen Germany
3. Department of Pediatrics; Childrens Hospital Chemnitz; Chemnitz Germany
4. Institute of Epidemiology and Medical Biometry; ZIBMT, University of Ulm, German Center for Diabetes Research (DZD); Ulm Germany
5. Department of Pediatric and Adolescent Medicine; University of Vienna; Vienna Austria
6. Department of Medical Psychology; Hannover Medical School; Hannover Germany
7. Department of Pediatrics Filderstadt Hospital; Filderklinik; Filderstadt Germany