title: Echinacea, vitamin C, the common cold, and blinding.
authors.forename: Harri
authors.initials: H
authors.lastname: Hemilä
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods* / Q000592:standards*; D003139:Common Cold / Q000188:drug therapy*; D020900:Echinacea / Q000737:chemistry*; D006801:Humans; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry / Q000627:therapeutic use; D015203:Reproducibility of Results
chemical_list: D010936:Plant Extracts