title: Milestone achieved: the specialty of sleep medicine.
authors.forename: Lawrence
authors.initials: L
authors.lastname: Epstein
mesh_terms: D006801:Humans; D008004:Licensure / Q000706:statistics & numerical data*; D008511:Medicine / Q000706:statistics & numerical data* / Q000639:trends*; D012893:Sleep Wake Disorders / Q000175:diagnosis / Q000628:therapy; D013038:Specialization; D013044:Specialty Boards / Q000706:statistics & numerical data* / Q000639:trends*; D014481:United States / Q000453:epidemiology