Diagnostic Performance of Six Tests for Helicobacter pylori Infection in Peptic Ulcer Bleeding: A Prospective Head-to-Head Comparison - Tanawat Geeratragool; Thanapat Atthakitmongkol; Supathep Tansirichaiya; Pubet Weeranawin; Somchai Leelakusolvong; Monthira Maneerattanaporn (Clinical and Translational Gastroenterology, 2026)