- Correspondence to Dr Adam Prokopowicz, Department of Chemical Hazards and Genetic Toxicology, Institute of Occupational Medicine and Environmental Health, 41-200 Sosnowiec, Kościelna 13, Poland;
- Received July 29, 2016
- Revised November 12, 2016
- Accepted November 24, 2016
- First published December 16, 2016.
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