title: Letter: Clinical trials with vitamin C.
mesh_terms: D001205:Ascorbic Acid / Q000008:administration & dosage / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D003139:Common Cold / Q000517:prevention & control*; D004305:Dose-Response Relationship, Drug; D006801:Humans
chemical_list: D001205:Ascorbic Acid