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Showing articles 0 to 3 of 3 Filter Applied: methylmalonic acid,serum (Click to remove) Clinicopathologic Conference, Functional Vitamin B12 Deficiency from Use of Nitrous Oxide NEJM 388:1893-1900, Case 15-2023, 2023 Progressive Weakness and Memory Impairment in a Middle-aged Man JAMA 320:197-198, DeFilippis, E.M.,et al, 2018 A Man with Tingling Fingers BMJ 346:f1443, Larkman, M.,et al, 2013 Showing articles 0 to 3 of 3