[1] Rush Univ, Dept Internal Med, Chicago, IL USA
[2] Rush Univ, Dept Emergency Med, Chicago, IL USA
[3] Rush Univ, Sch Med, Chicago, IL USA
[4] Mayo Clin, Div Palliat Med, Dept Internal Med, Phoenix, AZ USA
[5] Massachusetts Gen Hosp, Dept Emergency Med, Boston, MA USA
[6] Harvard Med Sch, Dept Emergency Med, Boston, MA USA
[7] Rush Univ, Dept Internal Med, Med Ctr, 1717 W Congress Pkwy, Chicago, IL 60612 USA
[8] Rush Univ, Dept Emergency Med, Med Ctr, 1717 W Congress Pkwy, Chicago, IL 60612 USA