NIEŚCIORUK, Michalina Weronika; KOZDROŃ, Dominika Julia; SZCZEPAŃSKA, Paulina; KOWALSKI, Jacek; DUTKIEWICZ, Dominika; YARBOU, Alia Echtay; MALLAH, Rami; MIKOŁAJUK, Adrian. NORMAL SERUM VITAMIN B12 LEVELS IN SYMPTOMATIC PATIENTS: DIAGNOSTIC VALUE OF METHYLMALONIC ACID AND HOMOCYSTEINE IN FUNCTIONAL DEFICIENCY. International Journal of Innovative Technologies in Social Science, [S. l.], v. 3, n. 2(50), 2026. DOI: 10.31435/ijitss.2(50).2026.5587. Disponível em: https://rspublisher.org/index.php/ijitss/article/view/5587. Acesso em: 17 jul. 2026.