1. a Bioproperties Ltd , 36 Charter St, Ringwood , Victoria , Australia , 3134
2. b Bábolna Breeding Farms KFT , H-2943 , Meszaros u. 1 , Hungary
3. c Aviagen Kft, Győr, Fehérvári u. 75 , H-9028 , Hungary
4. d Veterinary Laboratories Agency, Pentlands Science Park, Bush Loan , Penicuik , Midlothian , EH26 0PZ , UK
5. e Department for Electronmicroscopy , Institute for Veterinary Disease Control , Robert Kochgasse 17 , A-2340 , Mödling , Austria
6. f Clinic for Avian, Reptile and Fish Medicine, Veterinärplatz 1 , University of Veterinary Medicine , A-1210 , Vienna , Austria