1. University of Manchester; School of Nursing, Midwifery and Social Work; Room 6.31a, University Place Oxford Road Manchester UK M13 9PL
2. London School of Hygiene & Tropical Medicine; Cochrane Eyes and Vision Group, ICEH; Keppel Street London UK WC1E 7HT
3. Manchester Royal Eye Hospital; Academic Department of Ophthalmology; Oxford Road Manchester UK M13 9WH
4. Central Manchester & Manchester Children's NHS Trust; Optometry Department; Manchester Royal Eye Hospital Oxford Road Manchester UK M13 9WH