Serological and virological characterization of hepatitis B surface antigen-positive patients with or without Helicobacter pylori co-infection at the university of Gondar comprehensive specialized hospital, Northwest Ethiopia. - Belayneh, Mekuriaw; Tegegne, Bantayehu Addis; Tizazu, Anteneh Mehari; Yeshinew, Addisu Gize; Lemma, Mulualem; Abay, Zenahebezu; Belyhun, Yeshambel (BMC Infectious Diseases, 2025)