1. Palliative and Advanced Illness Research (PAIR) Center, University of Pennsylvania, Philadelphia, PA, USA
2. Division of Pulmonary, Allergy, and Critical Care, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
3. Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, PA, USA
4. Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
5. College of Arts and Sciences, University of Pennsylvania, Philadelphia, PA, USA
6. Mixed Methods Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA
7. Department of Medical Ethics and Health Policy, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
8. Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA