@article{ref1,
title="Occurrence of different knee disorders. a one-year prospective follow-up study",
journal="Italian journal of sports traumatology",
year="1988",
author="Kannus, Pekka and Jarvinen, M. and Kontiala, H and Bergius, L and Hyssy, E and Salminen, E. and Tuomi, A and Unkila, T and Valtanen, I",
volume="10",
number="4",
pages="213-220",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0391-4089",
doi="",
url="http://dx.doi.org/"
}