@article{ref1,
title="Back to Methuselah? Opportunities for preventive medicine",
journal="Irish journal of medical science",
year="1983",
author="Doll, Richard",
volume="152",
number="1",
pages="64-68",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-1265",
doi="",
url="http://dx.doi.org/"
}