[1] Univ Newcastle, Sch Med, Mitochondrial Res Grp, Royal Victoria Infirm,Dept Ophthalmol, Newcastle Upon Tyne, Tyne & Wear, England
[2] Cumberland Infirm Carlisle, Dept Neurol, Cumberland, MD USA
[3] Univ Newcastle, Inst Human Genet, Sch Med, Mitochondrial Res Grp, Newcastle Upon Tyne, Tyne & Wear, England