1 Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Bialystok, Sklodowskiej-Curie 24a, 15-276 Bialystok, Poland; Clinical Research Centre, Medical University of Bialystok, Sklodowskiej-Curie 24a, 15-276 Bialystok, Poland.
2 Center for Metabolomics and Bioanalysis (CEMBIO), Faculty of Pharmacy, University San Pablo-CEU, Montepríncipe Campus, Boadilla del Monte, 28668 Madrid, Spain.
3 Clinical Research Centre, Medical University of Bialystok, Sklodowskiej-Curie 24a, 15-276 Bialystok, Poland.