(a) Duodenum, A1A2 Mild and multifocal lymphoplasmacytic infiltration of the mucosa. Haematoxylin and eosin (H&E), 10×. (b) Duodenum, A2A2. Mild and multifocal lymphoplasmacytic infiltration of the mucosa. Haematoxylin and eosin (H&E), 10×. (c) Duodenum, CTRL. Mild and multifocal lymphoplasmacytic infiltration of the mucosa. Haematoxylin and eosin (H&E), 10×. (d) Ileum, A1A2. Mild and multifocal lymphoplasmacytic infiltration of the mucosa. H&E, 10×. (e) Ileum, A2A2. Mild and multifocal lymphoplasmacytic infiltration of the mucosa. H&E, 10×. (f) Ileum, CTRL. Mild and multifocal lymphoplasmacytic infiltration of the mucosa. H&E, 10×. (g) Duodenum, A1A2. Higher magnification of the lymphoplasmacytic infiltration in the mucosa. H&E, 20×. (h) Duodenum, A2A2. Higher magnification of the lymphoplasmacytic infiltration of the mucosa. H&E, 20×. (i) Duodenum, CTRL. Higher magnification of the lymphoplasmacytic infiltration of the mucosa. H&E, 20×. (l) Liver, A1A2. Moderate and diffuse vacuolar degeneration. H&E, 10×. (m) Liver, A2A2. Severe and diffuse vacuolar degeneration. H&E, 10×. (n) Liver, CTRL group. Mild and diffuse vacuolar degeneration. H&E, 10×.