1. Department of Family Medicine, Division of Palliative Medicine, University of Vermont Medical Center, Burlington, Vermont.
2. Department of Consumer Science, Purdue University, West Lafayette, Indiana.
3. Department of Medicine, University of California, San Francisco, San Francisco, California.
4. Medical Biostatistics Unit, University of Vermont, Burlington, Vermont.
5. Department of Family Medicine, University of Vermont, Burlington, Vermont.
6. Department of Medicine, University of Vermont, Burlington, Vermont.
7. School of Nursing, University of Rochester, Rochester, New York.