title: Analytic approaches to observational studies with treatment selection bias.
authors.forename: Ilya
authors.initials: I
authors.lastname: Novikov
authors.forename: Ofra
authors.initials: O
authors.lastname: Kalter-Leibovici
mesh_terms: D002986:Clinical Trials as Topic; D015233:Models, Statistical; D019370:Observation; D036301:Qualitative Research; D020379:Risk Adjustment; D015983:Selection Bias