@article{ref1,
title="Pain and emotional status (multiple letters)",
journal="Pain physician",
year="2002",
author="Fishbain, D. and Manchikanti, L.",
volume="5",
number="3",
pages="338-340",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1533-3159",
doi="",
url="http://dx.doi.org/"
}