TY - CONF AU - Ferreiro Iglesias, Rocio PY - 2013 SN - 1873-9946 UR - http://hdl.handle.net/20.500.11940/4142 LA - eng TI - Multicenter prospective observational study to assess the impact of surveillance, prophylaxis or treatment of the hepatitis B (HBV) and C (HCV) virus infection in patients with inflammatory bowel disease (IBD) under anti-TNF therapies VL - 7 ER -