[1] Duke Univ, Sanford Sch Publ Policy, Durham, NC USA
[2] Vanderbilt Univ, Med Ctr, Crit Illness Brain Dysfunct & Survivorship Ctr, Nashville, TN USA
[3] VA Tennessee Valley Geriatr Res Educ Clin Ctr, Nashville, TN USA
[4] Vanderbilt Univ, Div Allergy Pulm & Crit Care Med, 221 Kirkland Hall, Nashville, TN 37235 USA
[5] Univ Pittsburgh, Dept Med, Div Gen Internal Med, Sect Palliat Care & Med Eth, Pittsburgh, PA USA
[6] Brigham & Womens Hosp, Dept Med, Div Palliat Med, 75 Francis St, Boston, MA 02115 USA
[7] Dana Farber Canc Inst, Dept Psychosocial Oncol & Palliat Care, Boston, MA 02115 USA
[8] Harvard Med Sch, Brigham & Womens Hosp, Dept Med, Div Cardiovasc Med, Boston, MA 02115 USA
[9] Boston VA Healthcare Syst, Dept Med, Cardiol Sect, Boston, MA USA