1. Hospital for Children and Adolescents and the Program of Developmental and Reproductive Biology, Biomedicum, University of Helsinki, Helsinki, Finland
2. Departments of Pediatrics and Radiology, Turku University Hospital, Turku, Finland
3. Turku PET Centre, University of Turku, Turku, Finland
4. Department of Pediatrics and Adolescence, Oulu University Hospital, Oulu, Finland
5. Departments of Pediatrics and Medicine, Kuopio University Hospital, Kuopio, Finland
6. London Centre for Paediatric Endocrinology and Metabolism, Great Ormond Street Hospital for Children National Health Service Trust, Institute of Child Health, University College London, London, U.K
7. Astrid Lindgren’s Children Hospital, Karolinska University Hospital, Stockholm, Sweden
8. Department of Pathology, Université Catholique de Louvain, Brussels, Belgium