TY - JOUR T1 - Europe unveils risk assessment guidance for engineered nanomaterials used in food chain JF - Canadian Medical Association Journal JO - CMAJ SP - E774 LP - E774 DO - 10.1503/cmaj.109-3939 VL - 183 IS - 12 AU - Tiago Villanueva Y1 - 2011/09/06 UR - http://www.cmaj.ca/content/183/12/E774.abstract ER -