@article{ref1,
title="What football teaches us about researching complex health interventions",
journal="BMJ",
year="2012",
author="Clark, Alexander M. and Briffa, Thomas G. and Thirsk, Lorraine and Neubeck, Lis and Redfern, Julie",
volume="345",
number="",
pages="e8316-e8316",
abstract="<p>[Abstract unavailable]  Keywords: Soccer </p> <p>Language: en</p>",
language="en",
issn="0959-535X",
doi="",
url="http://dx.doi.org/"
}