title: Principal stratification: a broader vision.
authors.forename: Ian
authors.initials: I
authors.lastname: Shrier
authors.forename: Jay S
authors.initials: JS
authors.lastname: Kaufman
authors.forename: Robert W
authors.initials: RW
authors.lastname: Platt
authors.forename: Russell J
authors.initials: RJ
authors.lastname: Steele
mesh_terms: D015984:Causality; D006801:Humans; D015233:Models, Statistical; D016032:Randomized Controlled Trials as Topic; D012107:Research Design