1. Department Pediatric Endocrinology and Diabetology Children’s University Hospital Bonn Bonn Germany
2. Institute for Medical Biometry University Hospital of Bonn Bonn Germany
3. Institute of Clinical Chemistry and Clinical Pharmacology University Hospital Bonn Bonn Germany
4. Department Neonatology Children’s University Hospital Bonn Bonn Germany
5. Children’s University Hospital Erlangen Erlangen Germany