1. Department of Internal Medicine, Section of Endocrinology, Amsterdam UMC location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam , The Netherlands
2. Department of Internal Medicine, Division of Endocrinology, Radboud University Medical Center , 6525 GA Nijmegen , The Netherlands
3. Division of Endocrinology and Metabolism, Department of Internal Medicine, Erasmus Medical Center , 3015 GD Rotterdam , The Netherlands