title: Extraneous agents testing for substrates of avian origin and viral vaccines for poultry: current provisions and proposals for future approaches.
authors.affiliation: Paul-Ehrlich-Institut, Langen, Germany. junca@pei.de
authors.forename: Carmen
authors.initials: C
authors.lastname: Jungbäck
authors.forename: Andreas
authors.initials: A
authors.lastname: Motitschke