title: [Long-term proton pump inhibitor therapy: beware of vitamin B 12 deficiency].
authors.forename: H S
authors.initials: HS
authors.lastname: Füessl
mesh_terms: D002140:California; D016022:Case-Control Studies; D006635:Histamine H2 Antagonists / Q000009:adverse effects; D006801:Humans; D008134:Long-Term Care; D054328:Proton Pump Inhibitors / Q000008:administration & dosage / Q000009:adverse effects*; D014806:Vitamin B 12 Deficiency / Q000139:chemically induced* / Q000517:prevention & control
chemical_list: D006635:Histamine H2 Antagonists; D054328:Proton Pump Inhibitors