@article{ref1,
title="National Ambulatory Medical Care Survey: 1994 summary",
journal="Advance data",
year="1996",
author="Schappert, S. M.",
volume="",
number="273",
pages="1-18",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0147-3956",
doi="",
url="http://dx.doi.org/"
}