reticulocytes reticuloendothelial system reticulum retief retigabine retighten retin-a retina retina can retina display retina displays retina has retina may retina of the eye retina ready retina scan retinal retinal atrophy retinal blood retinal damage retinal degeneration retinal detachment retinal disease retinal diseases retinal function retinal ganglion cells retinal image retinal implant retinal pigment retinal pigment epithelial retinal scan retinal scanner retinal scans retinal vascular retinal vein occlusion retinas reting retinitis retinitis pigmentosa retinoblastoma retinoic retinoic acid retinoid retinoids retinol retinopathy retinopathy of prematurity retinue retinyl retinyl ester retinyl palmitate retire retire at age retire at the age retire at the end retire earlier retire early retire for the night retire from football retire from politics retire from professional retire from public retire here retire him retire i retire it retire me retire next year retire now retire one retire right retire so retire soon retire there retire you retired retired again retired air force retired american retired american professional retired and have retired and i retired and lives retired and living retired army retired as president retired as professor retired at age retired at the age retired back retired basketball retired bishop retired british retired canadian retired captain retired civil retired colonel retired cop retired couple