title: Modeling for health care and other policy decisions: uses, roles, and validity.
authors.forename: Paul C
authors.initials: PC
authors.lastname: Langley
mesh_terms: D002017:Budgets; D003362:Cost-Benefit Analysis; D004345:Drug Industry / Q000191:economics; D017850:Economics, Pharmaceutical; D006291:Health Policy; D006801:Humans; D018803:Models, Economic