@article{ref1,
title="Risk factors in patients after severe head injury",
journal="Annales Universitatis Mariae Curie-Sklodowska. Sectio D: Medicina",
year="1999",
author="Nogalski, A. and Krupski, W. and Karski, J. and Złomaniec, J.",
volume="54",
number="",
pages="109-115",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0066-2240",
doi="",
url="http://dx.doi.org/"
}