Martindale Jennifer L, Senecal Emily L, Obermeyer Ziad, Nadel Eric S, Brown David F M
Harvard Affiliated Emergency Medicine Residency, Division of Emergency Medicine, Harvard Medical School, Boston, Massachusetts, USA.
J Emerg Med. 2010 Oct;39(4):491-6. doi: 10.1016/j.jemermed.2010.03.021. Epub 2010 May 26.