@article{ref1,
title="The psychobiological regulation of social cooperation",
journal="Nature medicine",
year="1995",
author="Cloninger, C. R.",
volume="1",
number="7",
pages="623-625",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1078-8956",
doi="",
url="http://dx.doi.org/"
}