[1] Dept Hlth, Manila, Philippines
[2] Ctr Hlth Dev Reg XII, Gen Santos, Philippines
[3] Dept Agr, Manila, Philippines
[4] WHO, Manila, Philippines
[5] Ctr Dis Control & Prevent, Atlanta, GA USA
[6] Australian Anim Hlth Lab, Geelong, Vic, Australia
[7] Univ Queensland, Brisbane, Qld, Australia
[8] Natl Inst Infect Dis, Tokyo, Japan
[9] Australian Natl Univ, Canberra, ACT, Australia