@article{ref1,
title="Letter: Dangers of karate",
journal="JAMA journal of the American Medical Association",
year="1973",
author="Hirano, K. and Seto, M.",
volume="226",
number="9",
pages="1118-1119",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}