[1] Cent Clin Hosp, Clin Dept Internal Med & Gastroenterol, Inflammatory Bowel Dis Unit, Minist Interior & Adm, Warsaw, Poland
[2] Med Univ Bialystok, Dept Internal Med & Hypertens, Bialystok, Poland
[3] Med Univ Bialystok, Clin Hosp, Dept Hypertens Gastroenterol & Internal Med, Bialystok, Poland
[4] Pomeranian Med Univ, Dept Gastroenterol, Szczecin, Poland
[5] Jan Kochanowski Univ, Coll Med, Kielce, Poland
[6] Cent Clin Hosp, Clin Dept Internal Med & Gastroenterol, Inflammatory Bowel Dis Unit, Minist Interior & Adm, 137 Woloska St, PL-02507 Warsaw, Poland