@article{ref1,
title="Sleep disorders and depression",
journal="Psychiatria et Neurologia Japonica",
year="2006",
author="Shimizu, Tatsuya",
volume="108",
number="11",
pages="1203-1207",
abstract="<p>[Abstract unavailable]</p> <p>Language: ja</p>",
language="ja",
issn="0033-2658",
doi="",
url="http://dx.doi.org/"
}