The study covered bioelemental state of firemen living and working in North-West region of Russian Federation. The study was aimed to evaluate bioelemental state of firemen in dependence on residence area and on their work features. Regional features of firemen's bioelemental state were revealed. Findings are deficiency of some vitally important bioelements (iodine, selenium, cobalt) and accumulation of toxic microelements (nickel, silver, cadmium, arsenic, aluminium, lead). The authors demonstrated differences in contents of toxic microelements in dependence on length of service and degree of participation in fire-fighting.
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Шантырь et al. (2018) studied this question.