[1] RJAH Orthopaed Hosp, Wolfson Ctr Inherited Neuromuscular Dis, Oswestry, Shrops, England
[2] Keele Univ, Inst Sci & Technol Med, Keele, Staffs, England
[3] Univ Hosp Ctr Zagreb, Dept Ophthalmol, Zagreb, Croatia
[4] Zagreb E Med Ctr, Dept Paediat, Zagreb, Croatia
[5] Univ Zagreb, Sch Med, Dept Neurosci, Croatian Inst Brain Res, Zagreb 41001, Croatia