title: A randomized trial of vitamin A and vitamin E supplementation for retinitis pigmentosa.
authors.forename: E W
authors.initials: EW
authors.lastname: Norton
mesh_terms: D006801:Humans; D012107:Research Design; D012174:Retinitis Pigmentosa / Q000188:drug therapy*; D014801:Vitamin A / Q000627:therapeutic use*; D014810:Vitamin E / Q000627:therapeutic use*
chemical_list: D014801:Vitamin A; D014810:Vitamin E