@article{ref1,
title="Impairments due to injuries",
journal="American journal of public health",
year="1991",
author="Collins, J. G. and Biddlecom, A. E.",
volume="81",
number="12",
pages="1670-1672",
abstract="Abstract unavailable.",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}