Echinacea for the common cold.
Russo
Ethan B
EB
D003139:Common Cold / Q000188:drug therapy*; D004333:Drug Administration Routes; D020900:Echinacea; D006801:Humans; D008517:Phytotherapy / Q000379:methods* / Q000592:standards; D028321:Plant Preparations / Q000008:administration & dosage*
D028321:Plant Preparations