Endoscopy-guided surgery of an atrio-esophageal fistula after failure of self-expandable metal stents - Couto-Worner, Ignacio; Alonso-Aguirre, Pedro A.; Estévez-Prieto, Emilio; González-Conde, Benito; Velasco-García, Carlos; Cuenca-Castillo, José Joaquín; Fojón-Polanco, Salvador (Endoscopy, 2017)