Ethical approval
Due to the retrospective nature of the study and the risk of losing
participants in a small sample, we received approval by the Regional
Ethical Review Board in Uppsala, Sweden (reg. no. 2018/173) as well as
the Heads of Operations at Uppsala University Children’s Hospital and
the Habilitation Services in Uppsala to review data without obtaining
informed consent. All data are presented on group level to prevent
individual child or caregiver identification.