@article{ref1,
title="Blunt thoracic trauma",
journal="Pennsylvania medicine",
year="1972",
author="Pierce, W. S. and Tyers, G. F. and Waldhausen, J. A.",
volume="75",
number="9",
pages="53-55",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-4595",
doi="",
url="http://dx.doi.org/"
}