**5. Conclusions**


**Author Contributions:** Conceptualization, J.B.; methodology, J.B. and R.Ł.; software, R.Ł. and T.L.; formal analysis, J.B., A.A. and E.S.; investigation, J.B., R.Ł., T.L., E.M., A.A., A.T., K.B.-T., A.G. and K.K.; resources, J.B. and E.M.; data curation, J.B., R.Ł., A.A., E.M. and T.L.; writing—original draft preparation, J.B.; writing—review and editing, J.B., T.L. and A.A.; visualization, J.B., K.B.-T. and A.T.; supervision, J.B.; project administration, J.B.; funding acquisition, J.B. All authors have read and agreed to the published version of the manuscript.

**Funding:** The research was funded by the Polish Ministry of Health in 2016–2020 as part of the National Health Program (agreement 518/2016/DA).

**Institutional Review Board Statement:** The procedures used in this research were conducted in accordance with the World Medical Association's Declaration of Helsinki, and the research protocol was approved by the Ethics Committee of the Military Institute of Hygiene and Epidemiology— resolution number 1/XXI/2016.

**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.

**Data Availability Statement:** The data presented in this study are available on request from the corresponding author.

**Acknowledgments:** The authors sincerely thank all policemen who participated in the study.

**Conflicts of Interest:** The authors declare no conflict of interest.
