title: A randomized trial of vitamin A and vitamin E supplementation for retinitis pigmentosa.
authors.forename: D D
authors.initials: DD
authors.lastname: Clowes
mesh_terms: D000328:Adult; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D012107:Research Design; D012174:Retinitis Pigmentosa / Q000188:drug therapy*; D014801:Vitamin A / Q000009:adverse effects*; D014810:Vitamin E / Q000009:adverse effects*
chemical_list: D014801:Vitamin A; D014810:Vitamin E