1. Division of Veterinary Public Health, Faculty of Veterinary Medicine, Airlangga University, Surabaya, East Java, Indonesia
2. Laboratory of Virology and Immunology Division of Microbiology, Faculty of Veterinary Medicine, Airlangga University, Surabaya, East Java, Indonesia
3. Department of Epidemiology and Public Health, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore, Punjab, Pakistan
4. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, SAR