@article{ref1,
title="Heart rate variability in concussed athletes: a case report using the smartphone electrocardiogram",
journal="HeartRhythm case reports",
year="2017",
author="Lai, Ernest and Boyd, Kenny and Albert, David and Ciocca, Mario and Chung, Eugene H.",
volume="3",
number="11",
pages="523-526",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="2214-0271",
doi="10.1016/j.hrcr.2017.08.009",
url="http://dx.doi.org/10.1016/j.hrcr.2017.08.009"
}