Affiliation: | 1. University of Pennsylvania School of Nursing, Philadelphia, Pennsylvania, USA;2. Pulmonary, Allergy and Critical Care Division, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA;3. Pulmonary, Allergy and Critical Care Division, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA Palliative and Advanced Illness Research (PAIR) Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA;4. Department of Veterans Affairs, Corporal Michael J. Crescenz VA Medical Center - Philadelphia, University of Pennsylvania School of Nursing, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA |