@article{ref1,
title="Lessons from a cyclist. Doctors should do more to promote physical activity",
journal="British medical journal: BMJ",
year="1999",
author="Dietz, W. H. and Davis, R.",
volume="319",
number="7206",
pages="334-334",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}