title: Long-term trends in mortality in the intensive care unit.
authors.forename: Thomas L
authors.initials: TL
authors.lastname: Petty
mesh_terms: D017052:Hospital Mortality / Q000639:trends*; D006801:Humans; D007362:Intensive Care Units / Q000706:statistics & numerical data*; D029424:Pulmonary Disease, Chronic Obstructive / Q000401:mortality* / Q000628:therapy; D012121:Respiration, Artificial / Q000706:statistics & numerical data*