1. University Children's Hospital Tübingen; Tübingen Germany
2. Children's Hospital Böblingen; Böblingen Germany
3. Department of Pediatrics; Public Health Department Stuttgart; Stuttgart Germany
4. Department for Epidemiology and Health Care Research; Technical University of Dresden; Dresden Germany
5. German Diabetes Centre and Leibniz Institute for Diabetes Research; Heinrich Heine University Düsseldorf; Düsseldorf Germany
6. Institute of Epidemiology and Medical Biometry, ZIBMT; University Ulm; Ulm Germany