1. Department of Laboratory Medicine; Children's and Women's Health; Faculty of Medicine; Norwegian University of Science and Technology; Trondheim Norway
2. Department of Pediatrics; St. Olavs Hospital; University Hospital of Trondheim; Trondheim Norway
3. Vestfold Hospital Trust; Cerebral Palsy Register of Norway; Tønsberg Norway
4. DNA Science Core; University of Virginia School of Medicine; Charlottesville VA USA
5. Research Center for Genetic Medicine; Children's National Medical Center; George Washington University School of Medicine and Health Sciences; Washington DC USA
6. Department of Pediatrics; University of Virginia; Charlottesville VA USA
7. Cerebral Palsy International Research Foundation; New York NY USA