geographic atrophy Age-related macular degeneration 1 Geographic Atrophy 1 Healthy Volunteers 1 Humans 1 Lipofuscin 1 RBP4 protein, human 1 Retinal diseases 1 Retinol-Binding Proteins, Plasma 1 Retinol-binding protein 4 1 Stargardt Disease 1 Stargardt disease 1 Visual cycle 1 Vitamin A 1 age-related macular degeneration 1 complement 1 human 1 lipofuscin 1 meta-analysis 1 metabolism 1 normal human 1 plasma retinol binding protein 1 retinol 1