[1] Indiana Univ, Sch Med, Dept Emergency Med, Indianapolis, IN USA
[2] Indiana Univ, Sch Med, Ctr Aging Res, Indianapolis, IN USA
[3] Indiana Univ, Sch Med, Regenstrief Inst, Indianapolis, IN USA
[4] Case Western Reserve Univ, Dept Emergency Med, Cleveland Clin, Lerner Coll Med, Cleveland, OH 44106 USA
[5] Mt Sinai Sch Med, Brookdale Dept Geriatr & Adult Dev, Dept Emergency Med, New York, NY USA
[6] James J Peters Vet Adm Med Ctr, Ctr Geriatr Res Educ & Clin, Bronx, NY USA
[7] Northeastern Ohio Univ Coll Med & Pharm, Dept Community Hlth Sci, Akron, OH USA
[8] Summa Hlth Syst, Dept Emergency Med, Akron, OH USA
[9] Univ Calif Los Angeles, Dept Med, Los Angeles, CA 90024 USA