Validation of pelvic magnetic resonance imaging as the method of choice to determine the distance to the anal margin in rectal cancer Miguel Ángel Lorenzo Liñán; Juan García Armengol; Gonzalo Pablo Martín Martín; Vicente Martínez Sanjuán; José Vicente Roig Vila;

Registries and databases: How can we use them? Pilar Hernández-Granados; José Antonio Pereira Rodríguez; Marta Gimeno López;