@article{ref1,
title="Falls in the elderly population",
journal="Physical medicine and rehabilitation clinics of North America",
year="2005",
author="Lin, Jhih-Tsong and Lane, Joseph M.",
volume="16",
number="1",
pages="109-128",
abstract="Abstract unavailable.",
language="",
issn="1047-9651",
doi="10.1016/j.pmr.2004.06.005",
url="http://dx.doi.org/10.1016/j.pmr.2004.06.005"
}