Effectiveness of a high fiber diet in improving constipation in patients with defecatory dyssynergy under treatment with anorrectal biofeedback. Exploratory, randomized clinical trial Marianela Mego; José Wálter Huaman; Sebastian Videla; Marta Jansana; Karen Tinoco; Esteban Saperas;

Natural killer cell enteropathy mimicking lymphoma Andrea Isabel Montenegro Almeida; Steffi Verónica Vidal Aguirre; Miguel Ángel Piris Pinilla; Esteban Saperas;