title: Efficacy, effectiveness, variations, and quality. Boundary-crossing research.
mesh_terms: D004812:Epidemiologic Methods; D005069:Evaluation Studies as Topic; D006291:Health Policy; D006296:Health Services / Q000706:statistics & numerical data; D006302:Health Services Research / Q000379:methods*; D010043:Outcome and Process Assessment, Health Care; D011787:Quality of Health Care; D012107:Research Design; D014481:United States; D014600:Utilization Review