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Nasution, I. P. A.; Ruslie, R. H. The Difference in Serum Pepsinogen I, Pepsinogen II, Carcinoembryonic Antigen, and Carcinoma Antigen 72-4 Levels Between Children With and Without Helicobacter Pylori Infection. Open Access Maced J Med Sci 2022, 10, 1029-1032.