@article{ref1,
title="Walking and mortality in older men",
journal="New England journal of medicine",
year="1998",
author="Bueno, H. and Vidán, M.",
volume="338",
number="22",
pages="1622; author reply 1623-1622; author reply 1623",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-4793",
doi="10.1056/NEJM199805283382211",
url="http://dx.doi.org/10.1056/NEJM199805283382211"
}