@article{ref1,
title="Have we overlooked the most common cause of maternal mortality in the United States?",
journal="Journal of  midwifery and women's health",
year="2001",
author="Alpert, E. J.",
volume="46",
number="1",
pages="3-3",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1526-9523",
doi="",
url="http://dx.doi.org/"
}