1. Department of Internal Medicine, Academic Center for Thyroid Diseases and Rotterdam, the Netherlands.
2. Department of Epidemiology; Erasmus Medical Centre, Rotterdam, the Netherlands.
3. Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Centre, Nijmegen, The Netherlands.
4. Language and Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands.