1. Cerebral Palsy Alliance Research Institute, Specialty of Child and Adolescent Health, Sydney Medical School, Faculty of Medicine and Health The University of Sydney Sydney Australia
2. Center for Epidemiology and Research in Population health (CERPOP), Inserm University of Toulouse Toulouse France
3. Norwegian Quality and Surveillance Registry for Cerebral Palsy (NorCP), Vestfold Hospital Trust Tønsberg Norway
4. School of Health Sciences Northern Ireland, UK
5. Public Health Department University of Toulouse Toulouse France
6. Department of Pediatrics, Faculty of Medicine and Health Sciences McGill University Montreal Canada
7. Central Queensland Hospital and Health Service Rockhampton Australia
8. Department of Pediatrics, Institute of Clinical Sciences, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden