Crit Care Med 2014 May;42(5):1037-46
1Department of Acute and Tertiary Care, School of Nursing, University of Pittsburgh, Pittsburgh, PA. 2Department of Neurology, University of Pittsburgh, Pittsburgh, PA. 3Department of Biostatistics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA. 4National Center for Complementary and Alternative Medicine (NCCAM), National Institutes of Health, Bethesda, MD. 5The Clinical Research, Investigation, and Systems Modeling of Acute Illness Center, University of Pittsburgh, Pittsburgh, PA. 6Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA. 7Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA. 8Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA. 9Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA. 10Section on Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC. 11Department of Biostatistics, University of Washington, Seattle, WA. 12School of Medicine, University of Virginia, Charlottesville, VA.