作者单位:Univ Utrecht, Fac Vet Med, Inst Risk Assessment Sci IRAS, POB 80-177, NL-3508 TD Utrecht[1]European Food Safety Author, Sci Comm & Emerging Risks Unit, Via Carlo Magno 1A, I-43126 Parma[2]French Agcy Food Environm & Occupat Hlth & Safety, Risk Assessment Dept, 14 Rue Pierre & Marie[3]