@article{ref1,
title="The science base and social context of health maintenance: an overview",
journal="Science",
year="1978",
author="Hamburg, D. A. and Brown, S. S.",
volume="200",
number="4344",
pages="847-849",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0036-8075",
doi="",
url="http://dx.doi.org/"
}