. 2016 Aug 12;6(3):116–124. doi: 10.1016/j.afjem.2016.06.003
© 2016 African Federation for Emergency Medicine. Production and hosting by Elsevier B.V.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).