@article{ref1,
title="Longitudinal course of pediatric bipolar disorder",
journal="American journal of psychiatry",
year="2007",
author="Birmaher, Boris",
volume="164",
number="4",
pages="537-539",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-953X",
doi="10.1176/appi.ajp.164.4.537",
url="http://dx.doi.org/10.1176/appi.ajp.164.4.537"
}