title: Development, standardization and assessment of PCR systems for purity testing of avian viral vaccines.
authors.affiliation: Institute of Virology and Immunoprophylaxis IVI, OMCL Vaccine Control, Swiss Federal Veterinary Office, CH-3147 Mittelhäusern, Switzerland. hanspeter.ottiger@ivi.admin.ch
authors.forename: Hans-Peter
authors.initials: HP
authors.lastname: Ottiger