title: The "missing" investigation of the Legionnaires' Disease.
mesh_terms: D002487:Centers for Disease Control and Prevention, U.S.; D004196:Disease Outbreaks / Q000453:epidemiology / Q000517:prevention & control; D005554:Forensic Medicine; D006801:Humans; D007877:Legionnaires' Disease / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D010414:Pennsylvania; D013997:Time Factors; D014481:United States