title: Serum vitamin B 12  level in patients with amoebic liver abscess, opisthorchiasis and hookworm infections.
mesh_terms: D006725:Hookworm Infections / Q000097:blood*; D006801:Humans; D008101:Liver Abscess, Amebic / Q000097:blood*; D009889:Opisthorchiasis / Q000097:blood*; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D014805:Vitamin B 12