title: Why do physicians order laboratory tests? A study of laboratory test request and use patterns.
mesh_terms: D019411:Clinical Laboratory Techniques / Q000379:methods / Q000639:trends; D004194:Disease; D006801:Humans; D007753:Laboratories / Q000706:statistics & numerical data*; D008403:Mass Screening; D008991:Monitoring, Physiologic; D011379:Prognosis; D013812:Therapeutics; D014481:United States