@article{ref1,
title="Pertussis and the risk of non-accidental injury",
journal="British medical journal: BMJ",
year="1978",
author="Lee, D. S. and McEnery, G. and Norris, G. F.",
volume="2",
number="6148",
pages="1371-1371",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}