@article{ref1,
title="Toward the estimation of population impact in early posttraumatic stress disorder intervention trials",
journal="Depression and anxiety",
year="2012",
author="Zatzick, Douglas",
volume="29",
number="2",
pages="79-84",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1091-4269",
doi="10.1002/da.21912",
url="http://dx.doi.org/10.1002/da.21912"
}