[1] University of Pittsburgh School of Medicine,the Section of Palliative Care and Medical Ethics
[2] University of Pittsburgh School of Medicine,the Center for Research on Health Care
[3] University of Pittsburgh School of Medicine,the Center for Medical Ethics
[4] Duke UniversityMedical Center,the Center for Health Services Research in Primary Care, Durham Veteran’s Affairs Medical Center
[5] Duke University Medical Center,the Center for Clinical Health Policy Research
[6] Duke University Medical Center,the Center for the Study of Aging and Human Development
[7] Duke University Medical Center,the Department of Psychology
[8] Case Western Reserve University,Social and Health Sciences (MRR)
[9] University of Pittsburgh,the Department of Medicine