title: Letter: How blind is the double-blind?: an assessment in a lithium-prophylaxis study.
mesh_terms: D002986:Clinical Trials as Topic; D004341:Drug Evaluation; D006801:Humans; D008094:Lithium / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D010919:Placebos
chemical_list: D010919:Placebos; D008094:Lithium