@article{ref1,
title="Analytic epidemiologic approach to the studies in the field of orthopaedic surgery",
journal="Nippon Seikeigeka Gakkai Zasshi",
year="1992",
author="Hirota, Y.",
volume="66",
number="12",
pages="1286-1294",
abstract="<p>[Abstract unavailable]</p><p>Language: ja</p>",
language="ja",
issn="0021-5325",
doi="",
url="http://dx.doi.org/"
}