@article{ref1,
title="Travel by airplane during pregnancy",
journal="New Jersey medicine",
year="1986",
author="Breen, J. L. and Gregori, C. A. and Neilson, R. N.",
volume="83",
number="5",
pages="297-299",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0885-842X",
doi="",
url="http://dx.doi.org/"
}