title: Federal preemption of state regulation over air ambulances.
authors.forename: R Michael
authors.initials: RM
authors.lastname: Scarano
authors.forename: Bill
authors.initials: B
authors.lastname: Bryant
mesh_terms: D017732:Air Ambulances / Q000331:legislation & jurisprudence*; D035082:Federal Government; D033161:Government Regulation; D013219:State Government; D014481:United States