[1] Univ Pittsburgh, Clin Res Invest & Syst Modeling Acute Illness CRIS, Sch Med, Dept Crit Care Med,Program Eth & Decis Making, Pittsburgh, PA 15260 USA
[2] Univ Alberta, Fac Med & Dent, Dept Crit Care Med, Edmonton, AB, Canada
[3] Carnegie Mellon Univ, Dept Engn & Publ Policy, Pittsburgh, PA USA
[4] Duke Kunshan Univ, Global Hlth Res Ctr, Kunshan, Jiangsu, Peoples R China
[5] Univ Washington, Div Pulm Crit Care & Sleep Med, Seattle, WA USA
[6] Cambia Palliat Care Ctr Excellence UW Med, Seattle, WA USA
[7] Univ Toronto, Interdept Div Crit Care, Toronto, ON, Canada
[8] Univ Toronto, Dept Surg, Toronto, ON, Canada
[9] North York Gen Hosp, Dept Med, Div Crit Care Med, Toronto, ON, Canada
[10] Maine Med Ctr, Dept Pulm & Crit Care, Portland, ME USA
[11] Univ Penn, Palliat & Adv Illness Res Ctr, Dept Med, Philadelphia, PA USA
[12] Univ Calif San Francisco, Div Hosp Med, Dept Med, San Francisco, CA USA