GAST and vitamin B12 deficiency: The purpose of our study was to assess the predictive value (VP) for AIG of the combined testing for anti-parietal-cell antibodies (PCA), anti-intrinsic-factor antibodies (IFA), anti-Helicobacter pylori (Hp) antibodies and gastrin, in patients suffering from iron-deficiency or vitamin B12 deficiency anemia, and to analyse the diagnostic efficacy of this laboratory profile in the selection of the subjects candidate to endoscopy.