ASSESSMENT OF VITAMIN B-12 DEFICIENCY IN HELICOBACTER PYLORI STOOL ANTIGEN POSITIVE DYSPEPTIC PATIENTS VISITING A TERTIARY CARE HOSPITAL. Frontier in Medical and Health Research, [S. l.], v. 3, n. 5, p. 2022–2028, 2025. Disponível em: https://fmhr.net/index.php/fmhr/article/view/1327.. Acesso em: 24 sep. 2026.