title: Respiratory therapy: state of the art.
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D009316:National Institutes of Health (U.S.); D012106:Research; D012120:Respiration Disorders / Q000453:epidemiology / Q000401:mortality; D012138:Respiratory Therapy / Q000639:trends*; D014481:United States