Evaluation of Serum Levels of Anti-Helicobacter pylori IgG and IgA by ELISA Method in Patients with Gastric Ulcer in Chalous, Iran - Taravat, Arezoo; Bashi Zadeh Fakhar, Haniyeh; Shaghai, Babak; Rouhollah, Fatameh (Journal of Medical Bacteriology, 2024)