Chair and Department of Hygiene, Medical University of Lublin,
Radziwiłłowska 11, 20-080 Lublin, Poland
Submission date: 2014-11-03
Final revision date: 2015-09-23
Acceptance date: 2016-02-16
Publication date: 2016-05-25
Pol. J. Environ. Stud. 2016;25(3):1367–1371