1 Pulmonary, Allergy, and Critical Care Division, Department of Medicine (Drs Kerlin and Halpern), University of Pennsylvania, Philadelphia, PA; Center for Clinical Epidemiology and Biostatistics (Drs Kerlin and Halpern), University of Pennsylvania, Philadelphia, PA; Department of Medical Ethics and Health Policy (Dr Halpern), University of Pennsylvania, Philadelphia, PA; Perelman School of Medicine, University of Pennsylvania and Leonard Davis Institute of Health Economics (Drs Kerlin and Halpern), University of Pennsylvania, Philadelphia, PA; P30 Roybal Center on Behavioral Economics and Health (Dr Halpern), University of Pennsylvania, Philadelphia, PA; Fostering Improvement in End-of-Life Decision Science (FIELDS) Program (Dr Halpern), University of Pennsylvania, Philadelphia, PA. Electronic address: [email protected].
2 Pulmonary, Allergy, and Critical Care Division, Department of Medicine (Drs Kerlin and Halpern), University of Pennsylvania, Philadelphia, PA; Center for Clinical Epidemiology and Biostatistics (Drs Kerlin and Halpern), University of Pennsylvania, Philadelphia, PA; Department of Medical Ethics and Health Policy (Dr Halpern), University of Pennsylvania, Philadelphia, PA; Perelman School of Medicine, University of Pennsylvania and Leonard Davis Institute of Health Economics (Drs Kerlin and Halpern), University of Pennsylvania, Philadelphia, PA; P30 Roybal Center on Behavioral Economics and Health (Dr Halpern), University of Pennsylvania, Philadelphia, PA; Fostering Improvement in End-of-Life Decision Science (FIELDS) Program (Dr Halpern), University of Pennsylvania, Philadelphia, PA.