@article{ref1,
title="The case for stepped-wedge studies: a trial of falls prevention",
journal="Lancet",
year="2015",
author="Lamb, Sarah E.",
volume="385",
number="9987",
pages="2556-2557",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0140-6736",
doi="10.1016/S0140-6736(14)62288-1",
url="http://dx.doi.org/10.1016/S0140-6736(14)62288-1"
}