1. Division of Paediatric Endocrinology, Diabetology and Metabolism Department of Paediatrics University Hospital Bern Inselspital Bern Switzerland
2. Department of Dermatology University Hospital Bern Inselspital Bern Switzerland
3. University Institute of Clinical Chemistry University Hospital Bern Inselspital Bern Switzerland
4. Department of Human Genetics University Hospital Bern Inselspital Bern Switzerland