1. Virology Division, Department of Microbiology, South Eastern and Illawarra Arca Laboratory Services, The Prince of Wales Hospital, Barker St, Randwick, NSW 2031, Australia
2. School of Biochemistry and Biomedical Sciences, and the School of Medical Sciences, University of New South Wales, Sydney, NSW 2033, Australia
3. Commonweath Scientific and Industrial Research Organization Sustainable Ecosystems, Pest Animal Control Cooperative Research Centre, Canberra, ACT 2601, Australia
4. Current address: International Rice Research Institute, DAPO, Box 7777, Metro Manile, Phillipines