@article{ref1,
title="Mitral insufficiency resulting from an accident",
journal="Nederlands Tijdschrift voor Geneeskunde",
year="1966",
author="Njio, R. and Landheer, E. J.",
volume="110",
number="15",
pages="725-727",
abstract="<p>[Abstract unavailable]</p><p>Language: nl</p>",
language="nl",
issn="0028-2162",
doi="",
url="http://dx.doi.org/"
}