@article{ref1,
title="Do physical activity and physical fitness avert premature mortality?",
journal="Exercise and sport sciences reviews",
year="1996",
author="Lee, I-Min and Paffenbarger, R. S. Jr",
volume="24",
number="",
pages="135-171",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0091-6331",
doi="",
url="http://dx.doi.org/"
}