@misc{Nilsson_Robert_Letters,
 author={Nilsson, Robert and Jędrychowski, Wiesław},
 copyright={Nilsson, Robert},
 copyright={Jędrychowski, Wiesław},
 howpublished={online},
 publisher={Nofer Institute of Occupational Medicine},
 publisher={Polish Association of Occupational Medicine},
 language={eng},
 type={serial - article},
 type={language document},
 title={Letters to the editor},
}