1. Clinic for Paediatric and Adolescent Medicine, The Juliane Marie Centre; The University Hospital Rigshospitalet; Copenhagen
2. Centre for Biological Sequence Analysis; The Technical University of Denmark; Kgs. Lyngby
3. Centre for Genomic Medicine; The University Hospital Rigshospitalet; Copenhagen
4. Department of Clinical Genetics, The Juliane Marie Centre; The University Hospital; Rigshospitalet; Denmark
5. Department of Paediatrics; University Hospital; Reykjavik; Iceland
6. Department of Paediatric Haematology and Oncology, H. C. Andersen Children's Hospital; Odense University Hospital; Odense; Denmark
7. Department of Paediatrics; National Hospital; Oslo; Norway
8. Institute of Paediatric, Department of Women's and Children's Health; Uppsala; Sweden