@article{ref1,
title="The need to standardize methodology",
journal="Addiction",
year="1995",
author="Nickel, Wolf-Rüdiger",
volume="90",
number="12",
pages="1595; discussion 1595-601",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0965-2140",
doi="",
url="http://dx.doi.org/"
}