[1] Astrid Lindgren Childrens Hosp, Dept Womens & Childrens Hlth, Karolinska Inst, Neuropediat unit, Stockholm, Sweden
[2] Univ Med Ctr, Rudolf Magnus Inst Neurosci, Utrecht, Netherlands
[3] Univ Med Ctr, Ctr Excellence Rehabil Med, Utrecht, Netherlands
[4] Rehabil Ctr Hoogstr, Network Childhood Disabil Res Netherlands, Utrecht, Netherlands
[5] Norwegian Sch Sport Sci, Dept Phys Educ, Beitostolen, Norway
[6] Beitostolen Healthsport Ctr, Beitostolen, Norway
[7] Univ Oslo, Rikshosp, Dept Neurosci Children, Oslo Univ Hosp, N-0027 Oslo, Norway
[8] Malardalens Univ, CHILD & Sch Hlth Care & Social Welf, Vasteras, Sweden
[9] Jonkoping Univ, CHILD, Sch Hlth Sci, Jonkoping, Sweden