title: Risk adjustment for medical effectiveness research: an overview of conceptual and methodological considerations.
authors.affiliation: Department of Medicine, Harvard Medical School, Beth Israel Hospital, Boston, MA 02215, USA.
authors.forename: L I
authors.initials: LI
authors.lastname: Iezzoni
mesh_terms: D006801:Humans; D017063:Outcome Assessment, Health Care; D018570:Risk Assessment; D012307:Risk Factors