@article{ref1,
title="The validity of Medicaid diagnoses of hip fracture",
journal="American journal of public health",
year="1993",
author="Baum, C. and Wysowski, D. K.",
volume="83",
number="5",
pages="770-770",
abstract="Abstract unavailable.",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}