title: More pearls afoot.
authors.affiliation: Department of Medicine, Oregon Health & Science University, Portland, OR; Providence Portland Medical Center, Portland, OR; Oregon Clinic, Portland, OR. Electronic address: john_heffner@mac.com.
authors.forename: John E
authors.initials: JE
authors.lastname: Heffner
authors.affiliation: Medical University of South Carolina, Charleston, SC.
authors.forename: Steven A
authors.initials: SA
authors.lastname: Sahn
authors.affiliation: Division of Pulmonary, Allergy & Critical Care Medicine, University of Alabama at Birmingham, Birmingham, AL.
authors.forename: Susan M
authors.initials: SM
authors.lastname: Harding
mesh_terms: D003422:Critical Care; D006801:Humans; D010506:Periodicals as Topic; D015272:Pulmonary Medicine; D013902:Radiography, Thoracic; D056508:Sleep Medicine Specialty; D012893:Sleep Wake Disorders