Mesquita, Isabel, José Maria de la Peña, Jaime Vilaça, José Davide, Jorge Daniel, Luís Graça, & Manuel Teixeira. " Gangliocytic paraganglioma of ampulla of Vater: Clinical case." Revista Portuguesa de Cirurgia [Online],.2 (2007): 37-42. Web. 19 Apr. 2024