@article{ref1,
title="Randomised controlled trials in general practice: time for international collaboration",
journal="Injury prevention",
year="1998",
author="Underwood, Martin R. and Carter, Yvonne H.",
volume="4",
number="1",
pages="6-8",
abstract="Abstract unavailable.   <p> </p>",
language="en",
issn="1353-8047",
doi="",
url="http://dx.doi.org/"
}