title: End of the beginning.
authors.affiliation: Division of Sleep Medicine, Harvard Medical School and Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, MA; Arizona Respiratory Center, University of Arizona, Tucson, AZ.
authors.forename: Stuart F
authors.initials: SF
authors.lastname: Quan
mesh_terms: D006801:Humans; D010506:Periodicals as Topic; D056508:Sleep Medicine Specialty