1. University of Wisconsin , BerbeeWalsh Department of Emergency Medicine, 800 University Bay Drive , Madison, WI 53705 , USA
2. The Mount Sinai Hospital, Department of Emergency Medicine , New York, NY , USA
3. St. David’s South Austin Medical Center, Department of Emergency Medicine , Austin, TX , USA
4. Maimonidies Medical Center, Department of Emergency Medicine , New York, NY , USA