1. Division of Allergy and Clinical Immunology, Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands.
2. Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands.
3. Division of Endocrinology, Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands.
4. Department of Immunology, Erasmus University Medical Center, Rotterdam, The Netherlands.