@article{ref1,
title="Comments on meta-analysis",
journal="American journal of public health",
year="1989",
author="Lowenfels, A. B.",
volume="79",
number="1",
pages="102-103",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}