@article{ref1,
title="An unusual aspiration",
journal="Postgraduate medical journal",
year="1998",
author="Peters, F. P. and Drent, D. and Van Belle, A. F.",
volume="74",
number="876",
pages="639-639",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0032-5473",
doi="",
url="http://dx.doi.org/"
}