1. Division of Paediatric Endocrinology and Diabetes, Member of ENDO-ERN,
University Hospital Essen, University of Duisburg-Essen, Germany
2. Department of Endocrinology, Diabetes and Metabolism, Member of
ENDO-ERN, University Hospital Essen, University of Duisburg-Essen,
Germany
3. ENDOC Center for Endocrine Tumors, Hamburg, Germany, and University of
Duisburg-Essen, Germany