@article{ref1,
title="Approaches to primary prevention of disease",
journal="Public health reports (1896)",
year="1970",
author="Schuman, L. M.",
volume="85",
number="1",
pages="1-10",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0094-6214",
doi="",
url="http://dx.doi.org/"
}