1. Division of Pediatric and Adolescent Medicine; Oslo University Hospital, Oslo, Norway.
2. Faculty of Medicine, University of Oslo, Oslo, Norway.
3. Erasmus Medical Center, Department of Internal Medicine, Academic Center for Thyroid Diseases, Rotterdam, The Netherlands.
4. Department of Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway.
5. Department of Nuclear Medicine; Oslo University Hospital, Oslo, Norway.
6. Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden.
7. Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.
8. Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London, United Kingdom.
9. UK Dementia Research Institute at UCL, London, United Kingdom.
10. Department of Endocrinology, University of Duisburg-Essen, Essen, Germany.