1. Section of Biostatistics and Epidemiology, Department of Community and Family Medicine; Geisel School of Medicine at Dartmouth; Lebanon NH U.S.A.
2. The Dartmouth Institute for Health Policy and Clinical Practice; Geisel School of Medicine at Dartmouth; Lebanon NH U.S.A.
3. Section of Palliative Medicine, Department of Medicine; Geisel School of Medicine at Dartmouth; Lebanon NH U.S.A.