SHAIKH, Zeeshan; KHAN , Ali Nawaz; SHEIKH, Salman Amer; ANWAR, Syed Onaiz; AKHTAR, Saeed Khan; RAFIA ALVI. When B12 therapy fails: two case reports of intravenous vitamin B12 resistance in pernicious anemia. KHYBER MEDICAL UNIVERSITY JOURNAL, [S. l.], v. 16, n. 3, p. 266–9, 2024. DOI: 10.35845/kmuj.2024.23417. Disponível em: https://www.kmuj.kmu.edu.pk/article/view/23417. Acesso em: 1 may. 2025.