@article{ref1,
title="Re: "Heterogeneity of hip fracture: age, race, sex, and geographic patterns of femoral neck and trochanteric fractures among the US elderly"",
journal="American journal of epidemiology",
year="1996",
author="Levy, A. R. and Mayo, N. E. and Grimard, G.",
volume="144",
number="8",
pages="801-803",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9262",
doi="",
url="http://dx.doi.org/"
}