Letter: Clinical trials with vitamin C.
D000367:Age Factors; D000375:Aging; D001205:Ascorbic Acid / Q000627:therapeutic use*; D001206:Ascorbic Acid Deficiency / Q000188:drug therapy* / Q000209:etiology; D002986:Clinical Trials as Topic; D006707:Homes for the Aged; D006801:Humans
D001205:Ascorbic Acid