title: A co-twin control study of the effects of vitamin C.
mesh_terms: D000293:Adolescent; D000596:Amino Acids / Q000652:urine; D001205:Ascorbic Acid / Q000008:administration & dosage / Q000627:therapeutic use*; D002648:Child; D002784:Cholesterol / Q000097:blood; D003139:Common Cold / Q000517:prevention & control*; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D005260:Female; D006128:Growth / Q000187:drug effects; D006801:Humans; D007360:Intelligence / Q000187:drug effects; D008297:Male; D009048:Motor Skills / Q000187:drug effects; D011247:Pregnancy; D012737:Sex Factors; D014427:Twins; D014430:Twins, Monozygotic
chemical_list: D000596:Amino Acids; D002784:Cholesterol; D001205:Ascorbic Acid