“Histological Changes in the Gastric and Duodenal Mucosa in Children With Recurrent Abdominal Pain Treated at the Hospital Militar Escuela ‘Dr. Alejandro Dávila Bolaños’, 2017”. Revista Ciencias De La Salud Y Educación Médica , vol. 3, no. 3, Jan. 2022, pp. 2-8, https://revistas.unan.edu.ni/index.php/Salud/article/view/3733.