@article{ref1,
title="A statistics primer. Confidence intervals",
journal="American journal of sports medicine",
year="1998",
author="Greenfield, M. L. and Kuhn, J. E. and Wojtys, E. M.",
volume="26",
number="1",
pages="145-149",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0363-5465",
doi="",
url="http://dx.doi.org/"
}