1. Department of Veterinary Clinical Services; Hong Kong Jockey Club; Sha Tin Racecourse, Sha Tin New Territories Hong Kong
2. Agriculture, Fisheries and Conservation Department; Veterinary Laboratory Division; Tai Lung Experimental Station, Lin Tong Mei, Sheung Shui New Territories Hong Kong
3. Division of Virology; University of Glasgow; Church Street Glasgow G11 5JR
4. Commonwealth Scientific and Industrial Research Organisation (CSIRO); Livestock Industries; Australian Animal Health Laboratory; Private Bag 24 Geelong Australia
5. Department of Veterinary Regulation and International Liaison; Hong Kong Jockey Club; Sha Tin Racecourse, Sha Tin New Territories Hong Kong