The effect serum iron, vitamin B12 and ferritin levels in adult patients infected with Helicobacter pylori. Journal of Pharmaceutical Negative Results, [S. l.], p. 3205–3208, 2022. DOI: 10.47750/pnr.2022.13.S06.432. Disponível em: https://mail.pnrjournal.com/index.php/home/article/view/2479.. Acesso em: 13 jun. 2026.