title: Vitamin B12 deficiency in the breast-fed infant of a strict vegetarian.
mesh_terms: D001942:Breast Feeding; D014676:Diet, Vegetarian / Q000009:adverse effects*; D006801:Humans; D007223:Infant; D008297:Male; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis / Q000209:etiology*