Preoperative management of patients with oesophageal cancer: expert recommendations Marcos Bruna Esteban; Rocío Pérez Quintero; M. Asunción Acosta Mérida; Aitana García Tejero;

PROFUGO study protocol: Predictive model for the early diagnosis of anastomotic leak after esophagectomy and gastrectomy Rocío Pérez Quintero; Marcos Bruna Esteban; Antonio José Serrano López;

Multicenter clinical trial for the resection of rectal polyps using a new laparoendoscopic hybrid transanal access device José Francisco Noguera Aguilar; Alba Gómez Dovigo; Javier Aguirrezabalaga González; Benito González Conde; Pedro Alonso Aguirre; David Martínez Ares; Javier Sánchez González; María Pilar Díez Redondo; Olga Maseda Díaz; Maria Ignacia Torres García; Andrés Dacal Rivas; Salvadora Delgado Rivilla; Juan Manuel Romero Marcos; Pablo Ramírez Ruíz; Pedro de María Pallarés; Mario Álvarez Gallego; Inmaculada Gómez Besteiro;