1. Department of Pediatrics, University Hospitals Leuven, Leuven, Belgium.
2. Department of Internal Medicine, University Hospitals Leuven, Leuven, Belgium.
3. Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium.
4. Clinical and Experimental Endocrinology, KU Leuven, Leuven, Belgium.
5. Department of Development and Regeneration, KU Leuven, Leuven, Belgium.