@article{ref1,
title="More on posttraumatic stress disorder",
journal="American journal of psychiatry",
year="1987",
author="",
volume="144",
number="2",
pages="253-254",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-953X",
doi="",
url="http://dx.doi.org/"
}