Therapeutic drug monitoring in inflammatory bowel diseases. Position statement of the Spanish Working Group on Crohn¿s Disease and Ulcerative Colitis Francisco Rodríguez-Moranta; Federico Argüelles-Arias; Joaquín Hinojosa del Val; Marisa Iborra Colomino; M. Dolores Martín-Arranz; Luis Menchén Viso; Fernando Muñoz Núñez; Elena Ricart Gómez; José Germán Sánchez-Hernández; Teresa Valdés-Delgado; Jordi Guardiola Capón; Manuel Barreiro-de Acosta; Míriam Mañosa Ciria; Yamile Zabana Abdo; Ana Gutiérrez Casbas;

Correlation between endoscopy and intestinal ultrasound for the evaluation of postoperative recurrence of Crohn¿s disease Jorge Yebra Carmona; Joaquín Poza Cordón; Cristina Suárez Ferrer; Eduardo Martín Arranz; Javier Lucas Ramos; Irene Andaluz García; María Sánchez Azofra; José Luis Rueda García; María Dolores Martín Arranz;

Urgent endoscopy versus early endoscopy: Does urgent endoscopy play a role in acute non-variceal upper gastrointestinal bleeding? Javier Lucas Ramos; Jorge Yebra Carmona; Irene Andaluz García; Marta Cuadros Martínez; Patricia Mayor Delgado; Maria Ángeles Ruiz Ramírez; Joaquín Poza Cordón; Cristina Suárez Ferrer; Ana Delgado Suárez; Nerea Gonzalo Bada; Consuelo Froilán Torres;