1. Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium
2. Department of Public Health, Faculty of Medicine and Pharmacy, Biostatistics and Medical Informatics Research Group, Vrije Universiteit Brussel (VUB), Brussels, Belgium
3. Department of Chronic Diseases and Metabolism, Clinical and Experimental Endocrinology, KU Leuven, Leuven, Belgium