1. Moorfields Eye Hospital NHS Foundation Trust; Department of Anaesthesia; 162 City Road London UK EC1V 2PD
2. King's College London; Department of Primary Care & Public Health Sciences; 4th Floor, Addison House Guy's Campus London UK SE1 1UL
3. Moorfields Eye Hospital & UCL Institute of Ophthalmology; The Joint Library of Ophthalmology; 11-43 Bath Street London UK EC1V 9EL