1 Palliative and Advanced Illness Research (PAIR) Center, University of Pennsylvania in Philadelphia, Philadelphia, PA; Department of Medicine, University of Pennsylvania in Philadelphia, Philadelphia, PA; Leonard Davis Institute of Health Economics, University of Pennsylvania in Philadelphia, Philadelphia, PA. Electronic address: Catherine.auriemma@pennmedicine.upenn.edu.
2 Department of Medicine, The Pulmonary Center, Boston University School of Medicine, Boston, MA.