Challenges of independent clinical research Javier P. Gisbert; María Chaparro;

Recommendations of the Crohn¿s Disease and Ulcerative Colitis Spanish Working Group (GETECCU) for the treatment of perianal fistulas of Crohn¿s disease Marta M. Boscá; Rafael Alós; Nuria Maroto; Javier P. Gisbert; Belén Beltrán; María Chaparro; Pilar Nos; Miguel Mínguez; Joaquin Hinojosa;