@article{ref1,
title="An unexpected burden--the safety of air ambulances",
journal="JAMA journal of the American Medical Association",
year="1988",
author="Dimick, A. R. and Dietz, P. A.",
volume="259",
number="23",
pages="3405-3405",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}