TY - CONF AU - González Conde, Benito AU - Barreiro de Acosta, Manuel PY - 2011 SN - 0016-5085 UR - http://hdl.handle.net/20.500.11940/6724 LA - eng TI - Impact of smoking on Crohn's disease clinical course: Data from the multicenter Spanish study VL - 5 ER -