title: Commentary: observational studies and their importance in improving end-of-life care in the intensive care unit.
authors: Harborview Medical Center, Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, Washington Seatle, WA 98104-2499, USA. rengel@u.washington.edu
authors: Ruth A
authors: RA
authors: Engelberg
mesh_terms: D016223:Advance Directives; D006801:Humans; D007362:Intensive Care Units / Q000592:standards*; D010166:Palliative Care; D013727:Terminal Care / Q000592:standards*