1. Ocean Park Corporation; Aberdeen Hong Kong
2. Department of Microbiology; The University of Hong Kong; Pokfulam Hong Kong
3. School of Veterinary Medicine; University of California; Davis CA USA
4. State Key Laboratory of Emerging Infectious Diseases; The University of Hong Kong; Pokfulam Hong Kong
5. Research Centre of Infection and Immunology; The University of Hong Kong; Pokfulam Hong Kong
6. Carol Yu Centre for Infection; The University of Hong Kong; Pokfulam Hong Kong