title: Blinding in placebo-controlled trials.
authors: A S
authors: AS
authors: Prasad
mesh_terms: D000998:Antiviral Agents / Q000627:therapeutic use; D003139:Common Cold / Q000188:drug therapy; D004311:Double-Blind Method; D006801:Humans; D010919:Placebos; D016032:Randomized Controlled Trials as Topic / Q000379:methods / Q000592:standards*; D015032:Zinc / Q000627:therapeutic use
chemical_list: D000998:Antiviral Agents; D010919:Placebos; D015032:Zinc