Clinical Research Center, Medical University of Bialystok, Poland; Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Bialystok, Poland. Electronic address: drygalskikrzysztof@gmail.com. Jan Biziel University Hospital No. 2, Bydgoszcz, Poland. Experimental Dentistry Laboratory, Medical University of Bialystok, Poland. Clinical Research Center, Medical University of Bialystok, Poland; Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Bialystok, Poland. Department of Hygiene, Epidemiology and Ergonomics, Medical University of Bialystok, Poland. Department of Hygiene, Epidemiology and Ergonomics, Medical University of Bialystok, Poland. Electronic address: mat.maciejczyk@gmail.com.