[1] Elizabeth Macarthur Agr Inst, Virol Lab, Menangle, NSW, Australia
[2] Publ Hlth Unit, Sydney, NSW, Australia
[3] SW Area Pathol Serv, Sydney, NSW, Australia
[4] Inst Clin Pathol & Med Res, Westmead, NSW, Australia
[5] NSW Dept Hlth, Sydney, NSW, Australia
[6] Univ Sydney, Sydney, NSW 2006, Australia
[7] NSW Dept Agr, Menangle, Australia
[8] Univ New S Wales, Sydney, NSW, Australia
[9] Prince Wales Hosp, SEALS Dept, Sydney, NSW, Australia