@article{ref1,
title="Health prevention messages may have paradoxical effect",
journal="British medical journal: BMJ",
year="1993",
author="Collins, S.",
volume="306",
number="6882",
pages="926-926",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}