[1] Univ Glasgow, Inst Hlth & Wellbeing, Glasgow, Lanark, Scotland
[2] Natl Hlth Serv Greater Glasgow & Clyde, Royal Hosp Sick Children, Fraser Allander Neurosci Unit, Glasgow, Lanark, Scotland
[3] Newcastle & Tyne Natl Hlth Serv Trust, Newcastle Gen Hosp, Reg Neurosci Ctr, Newcastle, England