title: USEFULNESS OF PERORAL INTESTINAL BIOPSY IN THE DIAGNOSIS OF TWO UNUSUAL CAUSES OF MALABSORPTION.
mesh_terms: D001706:Biopsy; D019411:Clinical Laboratory Techniques; D006801:Humans; D007753:Laboratories; D008286:Malabsorption Syndromes; D010336:Pathology
keywords: BIOPSY; DIAGNOSIS, LABORATORY; MALABSORPTION SYNDROMES; PATHOLOGY