1. Macular Pigment Research Group, Nutrition Research Centre Ireland, School of Health Sciences, Waterford Institute of Technology, Waterford, Ireland
2. Centre for Public Health, Queen's University Belfast, Belfast, United Kingdom
3. Nutritional Neuroscience Laboratory, Department of Physiology and Pharmacology, University of Georgia, Athens, Georgia, United States
4. NIHR Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, United Kingdom