[1] CHU Laval, Emergency Dept, Quebec City, PQ G1V 4G2, Canada
[2] Hunter New England Hlth, Emergency Dept, Newcastle, NSW, Australia
[3] Hunter New England Populat Hlth, Hlth Protect, Wallsend, Australia
[4] Tamworth Base Hosp, Emergency Dept, Tamworth, NSW, Australia
[5] Hunter New England Hlth, Infect Prevent & Control, Newcastle, NSW, Australia
[6] Hunter New England Populat Hlth, Hlth Protect, Tamworth, NSW, Australia