@article{ref1,
title="Effects of selection on mortality",
journal="American journal of epidemiology",
year="1974",
author="Seltzer, C. C. and Jablon, S.",
volume="100",
number="5",
pages="367-372",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9262",
doi="",
url="http://dx.doi.org/"
}