@article{ref1,
title="Different concepts of chronic musculoskeletal pain",
journal="Annals of the rheumatic diseases",
year="1995",
author="Awerbuch, M.",
volume="54",
number="5",
pages="331-332",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-4967",
doi="",
url="http://dx.doi.org/"
}