@article{ref1,
title="Electronic devices and applications to track physical activity",
journal="JAMA journal of the American Medical Association",
year="2015",
author="Schrack, Jennifer and Zipunnikov, Vadim and Crainiceanu, Ciprian",
volume="313",
number="20",
pages="2079-2080",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0098-7484",
doi="10.1001/jama.2015.3877",
url="http://dx.doi.org/10.1001/jama.2015.3877"
}