National observational study about the surgical treatment of anal fistula: Does the kind of hospital modify the results? Oscar Cano-Valderrama; Carlos Cerdán-Santacruz; Pilar Fernández Veiga; Tamara Fernández-Miguel; Elena Viejo; Álvaro García-Granero; Teresa Calderón; María L. Reyes;

Comparison of different methods to manage supralevator rectal opening in anal fistulas: A retrospective cohort study Pankaj Garg; Geetha R Menon; Baljit Kaur;

Characteristics and oncological results of epidermoid anal carcinoma: Comparison analysis between immunocompetent and immunosuppressed patients Yolanda Saralegui Ansorena; Jose Maria Enriquez-Navascues; Carlos Placer Galan; Nerea Borda Arrizabalaga; Jose Luis Elosegui Aguirrezabala; Garazi Elorza Echaniz; Ane Etxart Lopetegi; Ignacio Aguirre Allende;