"Where's the science"?
Hedrick
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University Hospitals and Clinics, University of Missouri-Columbia, Columbia, MO 65212, USA.
D002487:Centers for Disease Control and Prevention, U.S.; D019317:Evidence-Based Medicine; D017408:Guidelines as Topic; D006801:Humans; D017053:Infection Control / Q000295:instrumentation* / Q000379:methods / Q000592:standards* / Q000639:trends; D008397:Masks / Q000592:standards*; D012134:Respiratory Protective Devices / Q000592:standards*; D012586:Science; D014397:Tuberculosis, Pulmonary / Q000517:prevention & control; D014481:United States; D014489:United States Occupational Safety and Health Administration