[1] E Carolina Univ, Brody Sch Med, Dept Med Humanities, Bioeth Ctr,Univ Hlth Syst Eastern Carolina, Greenville, NC 27834 USA
[2] St Vincent Mercy Med Ctr, Dept Emergency Med, Toledo, OH USA
[3] Univ Texas Southwestern, Dept Surg, Dallas, TX USA
[4] Univ Texas Southwestern, Dept Emergency Med, Dallas, TX USA
[5] Univ Texas Southwestern, Dept Publ Hlth, Dallas, TX USA
[6] Cedars Sinai Med Ctr, Ruth & Harry Roman Emergency Dept, Dept Emergency Med, Cedars Sinai Ctr Hlth Care Eth,Burns & Allen Res, Los Angeles, CA 90048 USA
[7] Med Coll Wisconsin, Ctr Study Bioeth, Milwaukee, WI 53226 USA
[8] Med Coll Wisconsin, Dept Emergency Med, Milwaukee, WI 53226 USA