A Goringe, R Ellis, I McDowell, J Vidal-Alaball, C Jenkins, C Butler, M Worwood. The limited value of methylmalonic acid, homocysteine and holotranscobalamin in the diagnosis of early B12 deficiency. haematol [Internet]. 2006Feb.1 [cited 2024Nov.25];91(2):231-4. Available from: https://haematologica.org/article/view/3848