@article{ref1,
title="The reliability of self-reporting blood type: helmet patches, id tags, tattoos, and other blood type identification",
journal="American surgeon",
year="2016",
author="Swann, Jacob A. and Hofmann, Luke J.",
volume="82",
number="12",
pages="355-358",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0003-1348",
doi="",
url="http://dx.doi.org/"
}