@article {256, editor = {,}, title = {Emergency Medicine Questions (EMQ)316}, volume = {25}, number = {5}, pages = {256--256}, year = {2008}, publisher = {British Association for Accident and Emergency Medicine}, issn = {1472-0205}, URL = {https://emj.bmj.com/content/25/5/256}, eprint = {https://emj.bmj.com/content/25/5/256.full.pdf}, journal = {Emergency Medicine Journal} }