GomesJ.A., SouzaB.F.M. de, YasojimaE.Y. and ValenteT.O. de N. 2024. Analysis of vitamin B12 deficiency in post-bariatric surgery patients at a private hospital in the amazon region. Electronic Journal Collection Health. 24, 11 (Nov. 2024), e18413. DOI:https://doi.org/10.25248/reas.e18413.2024.