title: Reducing bias in outcome measures.
authors.forename: Jerrold
authors.initials: J
authors.lastname: Lerman
mesh_terms: D000769:Anesthesia, Inhalation / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D015588:Observer Variation; D010149:Postoperative Pain / Q000517:prevention & control; D010349:Patient Compliance / Q000523:psychology / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D013315:Stress, Psychological / Q000517:prevention & control