@article{ref1,
title="Should dead cases be matched to dead controls?",
journal="American journal of epidemiology",
year="1983",
author="Kraus, Jess Frank",
volume="117",
number="3",
pages="375-375",
abstract="Abstract unavailable.",
language="",
issn="0002-9262",
doi="",
url="http://dx.doi.org/"
}