title: Rare outcomes, common treatments: analytic strategies using propensity scores.
authors.forename: Leonard E
authors.initials: LE
authors.lastname: Braitman
authors.forename: Paul R
authors.initials: PR
authors.lastname: Rosenbaum
mesh_terms: D015982:Bias; D006801:Humans; D011379:Prognosis; D016032:Randomized Controlled Trials as Topic / Q000592:standards / Q000706:statistics & numerical data*; D013223:Statistics as Topic; D016896:Treatment Outcome