[1] Rutgers Robert Wood Johnson Med Sch, Dept Med, New Brunswick, NJ USA
[2] Northwestern Univ, Feinberg Sch Med, Dept Emergency Med, Chicago, IL 60611 USA
[3] State Univ New York Downstate Hlth Sci Univ, Dept Physiol & Pharmacol, Brooklyn, NY USA
[4] OhioHlth Doctors Hosp, Emergency Med, Columbus, OH 43228 USA
[5] Ohio Univ, Heritage Coll Osteopath Med, Emergency Med, Athens, OH 45701 USA