1. Department of Paediatrics and Adolescent Medicine Center for Rett syndrome Rigshospitalet, Copenhagen Denmark
2. Telethon Kids Institute The University of Western Australia Perth Western Australia Australia
3. Department of Clinical Genetics Rigshospitalet, Copenhagen Denmark
4. Department of Paediatrics and Adolescent Medicine Herlev Hospital Copenhagen Denmark
5. Curtin School of Allied Health Curtin University Perth Western Australia Australia