[1] Med Univ Bialystok, Dept Biochem Diagnost, Bialystok, Poland
[2] Med Univ Bialystok, Prov Welded Hosp Bialystok, Dept Clin Med, Dept Gastroenterol Hepatol & Internal Dis,Ctr Dia, Bialystok, Poland
[3] Prov Welded Hosp Bialystok, Dept Gastroenterol Hepatol & Internal Dis, Ctr Diagnost & Endoscop Treatment, Bialystok, Poland
[4] Med Univ Bialystok, Dept Paediat Lab Diagnost, Bialystok, Poland