Chudzik, R., Rybojad, B. and Rybojad, P. 2020. The number of passively smoked cigarettes and the risk of lung cancer among the inhabitants of the Lubelskie Region (2013-2017). Journal of Education, Health and Sport. 10, 9 (Sep. 2020), 248–255. DOI:https://doi.org/10.12775/JEHS.2020.10.09.027.