@article{ref1,
title="Social stimulus factors in drug effects in human subjects",
journal="NIDA research monograph",
year="1981",
author="Stitzer, M. L. and Griffiths, Roland R. and Bigelow, G. E. and Liebson, I. A.",
volume="37",
number="",
pages="130-154",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}