[1] Duke Univ, Dept Med, Div Pulm & Crit Care Med, Durham, NC 27710 USA
[2] Duke Univ, Program Support People & Enhance Recovery, Durham, NC 27710 USA
[3] Duke Univ, Dept Anesthesiol, Durham, NC 27710 USA
[4] Univ Kentucky, Dept Neurol, Lexington, KY 40536 USA
[5] Univ Kentucky, Div Palliat Care, Lexington, KY USA
[6] Duke Univ, Palliat Care Med Program, Durham, NC 27710 USA
[7] Univ Washington, Dept Neurol, Seattle, WA 98195 USA
[8] Duke Univ, Sch Nursing, Durham, NC 27710 USA