@article {542, editor = {,}, title = {EMQ answers 476}, volume = {25}, number = {8}, pages = {542--542}, year = {2008}, publisher = {British Association for Accident and Emergency Medicine}, issn = {1472-0205}, URL = {https://emj.bmj.com/content/25/8/542}, eprint = {https://emj.bmj.com/content/25/8/542.full.pdf}, journal = {Emergency Medicine Journal} }