title: Is treatment heterogeneity an Achilles' heel for comparative effectiveness research?
authors: G Caleb
authors: GC
authors: Alexander
authors: Bruce L
authors: BL
authors: Lambert
mesh_terms: D057171:American Recovery and Reinvestment Act; D057186:Comparative Effectiveness Research / Q000379:methods*; D003695:Delivery of Health Care / Q000191:economics*; D006801:Humans; D011787:Quality of Health Care; D014481:United States