1. Division of Pulmonary, Allergy, and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia
2. Palliative and Advanced Illness Research (PAIR) Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia
3. Center for Home Care Policy & Research, Visiting Nurse Service of New York, New York
4. Department of Economics, Hunter College, The City University of New York (CUNY), New York
5. National Bureau of Economic Research, Cambridge, Massachusetts
6. Department of Biobehavioral Health Sciences, School of Nursing, University of Pennsylvania, Philadelphia