Pernasal vitamin C and the common cold.
Gotzsche
A L
AL
D000281:Administration, Intranasal; D001205:Ascorbic Acid / Q000008:administration & dosage*; D003139:Common Cold / Q000517:prevention & control*; D006801:Humans; D011208:Powders
D011208:Powders; D001205:Ascorbic Acid