1. Department of Veterinary Clinical Sciences, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Hong Kong
2. CityU Veterinary Medical Centre, City University of Hong Kong, Hong Kong
3. Department of Veterinary Clinic and Surgery, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
4. Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Hong Kong
5. VDL Veterinary Diagnostic Laboratory, City University of Hong Kong, Hong Kong