Holger Joel S, Engebretsen Kristin M, Stellpflug Samuel J, Cole Jon B, Kerns William
Regions Hospital Emergency Department, St Paul, MN.
Hennepin County Medical Center, Minneapolis, MN.
Ann Emerg Med. 2014 Jan;63(1):91-2. doi: 10.1016/j.annemergmed.2013.10.036.