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Oral versus intramuscular administration of vitamin B12 for vitamin B12 deficiency in primary care: a pragmatic, randomised, non-inferiority clinical trial (OB12).
Sanz-Cuesta T, Escortell-Mayor E, Cura-Gonzalez I, Martin-Fernandez J, Riesgo-Fuertes R, Garrido-Elustondo S, Mariño-Suárez JE, Álvarez-Villalba M, Gómez-Gascón T, González-García I, González-Escobar P, Vargas-Machuca Cabañero C, Noguerol-Álvarez M, García de Blas-González F, Baños-Morras R, Díaz-Laso C, Caballero-Ramírez N, Herrero de-Dios A, Fernández-García R, Herrero-Hernández J, Pose-García B, Sevillano-Palmero ML, Mateo-Ruiz C, Medina-Bustillo B, Aguilar-Jiménez M; OB12 Group. Sanz-Cuesta T, et al. BMJ Open. 2020 Aug 20;10(8):e033687. doi: 10.1136/bmjopen-2019-033687. BMJ Open. 2020. PMID: 32819927 Free PMC article. Clinical Trial.