1. Institute of Special Pathology and Veterinary Medical Clinic, Faculty of Veterinary Medicine, The University of Milan
2. Animal Center for Biomedical Research, Graduate School of Medicine, The University of Tokyo
3. Institute of Immunology, Federal Research Centre for Virus Diseases of Animals
4. Multizonal Center for Hygiene and Prevention
5. Institute of Pharmacology, Faculty of Medicine, The University of Milan
6. Institute of Virology, Faculty of Medicine, The University of Milan