Early-rectal Cancer Treatment: A Decision-tree Making Based on Systematic Review and Meta-analysis Ignacio Aguirre-Allende; Jose Maria Enriquez-Navascues; Garazi Elorza-Echaniz; Ane Etxart-Lopetegui; Nerea Borda-Arrizabalaga; Yolanda Saralegui Ansorena; Carlos Placer-Galan;

Care burden and outcome of the surgical management of ulcerative colitis: A retrospective analysis of the last 20 years in a tertiary hospital in Spain Ignacio Aguirre-Allende; Jose M. Enríquez-Navascués; Garazi Elorza; Ane Etxart; Ainhoa Echeveste; Nerea Borda-Arrizabalaga; Carlos Placer; Yolanda Saralegui;

Concept of risk factor as an estimate of association and treatment effect: Measures and meaning Jose M. Enríquez-Navascués; Ignacio Aguirre-Allende;