[1] Univ Hosp Bristol NHS Fdn Trust, Bristol Eye Hosp, Bristol, Avon, England
[2] Univ Liverpool, Clin Trials Res Ctr, Dept Biostat, Liverpool, Merseyside, England
[3] Univ Liverpool, Dept Womens & Childrens Hlth, Inst Translat Med, Liverpool, Merseyside, England
[4] Alder Hey Childrens NHS Fdn Trust, Dept Paediat Rheumatol, Liverpool, Merseyside, England
[5] Univ Bristol, Bristol, Avon, England
[6] Moorfields Eye Hosp NHS Fdn Trust, Natl Inst Hlth Res, London, England
[7] Moorfields Eye Hosp NHS Fdn Trust, Biomed Res Ctr, London, England
[8] UCL Inst Ophthalmol, London, England
[9] Univ Hosp Bristol NHS Fdn Trust, Dept Paediat Rheumatol, Bristol, Avon, England