title: Low serum vit. B12 level does not mean vit. B12 deficiency - problems related to the diagnosis of vitamin B12 deficiency.
authors.affiliation: Department of Ophthalmology, Poznań City Hospital , Poznań , Poland and.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Grzybowski
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D009412:Nerve Fibers / Q000473:pathology*; D009901:Optic Nerve Diseases / Q000473:pathology*; D012160:Retina / Q000473:pathology*; D012162:Retinal Degeneration / Q000473:pathology*; D041623:Tomography, Optical Coherence / Q000379:methods*; D014806:Vitamin B 12 Deficiency / Q000473:pathology*