@article{ref1,
title="Instability of symptoms in recurrent major depression",
journal="American journal of psychiatry",
year="2005",
author="Allen, Michael H. and Chessick, Cheryl A.",
volume="162",
number="2",
pages="403; author reply 403-4",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-953X",
doi="10.1176/appi.ajp.162.2.403",
url="http://dx.doi.org/10.1176/appi.ajp.162.2.403"
}