[Prophylactic value of vitamin C in acute respiratory tract infections in schoolchildren].
D000208:Acute Disease; D001205:Ascorbic Acid / Q000009:adverse effects / Q000627:therapeutic use*; D002648:Child; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D011446:Prospective Studies; D012141:Respiratory Tract Infections / Q000517:prevention & control*
D001205:Ascorbic Acid
Valor profiláctico de la vitamina C en infecciones respiratorias agudas del escolar.