[1] Hosp Sick Children, Toronto, ON M5G 1X8, Canada
[2] Univ Toronto, Toronto, ON M5S 1A1, Canada
[3] Bloorview Kids Rehab, Toronto, ON, Canada
[4] Tampere Univ, Rega Inst Regenerat Med, FIN-33101 Tampere, Finland
[5] Univ Oulu, Oulu, Finland
[6] King Abdulaziz Med Ctr, Riyadh, Saudi Arabia