@article{ref1,
title="Commentary: Thomas & Gunnell's paper",
journal="International journal of epidemiology",
year="2010",
author="Goldberg, David",
volume="39",
number="6",
pages="1475-1477",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0300-5771",
doi="10.1093/ije/dyq160",
url="http://dx.doi.org/10.1093/ije/dyq160"
}