[1] Hanoi Univ Publ Hlth, Ctr Publ Hlth & Ecosyst Res, Duc Thang Ward, 1A Duc Thang Rd, Hanoi 100000, Vietnam
[2] Rakuno Gakuen Univ, Sch Vet Med, Vet Epidemiol Unit, 582 Bunkyodai Midorimachi, Ebetsu, Hokkaido 0698501, Japan
[3] Int Livestock Res Inst, 298 Kim Ma St, Hanoi 100000, Vietnam
[4] Swiss Trop & Publ Hlth Inst Swiss TPH, Dept Epidemiol & Publ Hlth, 57 Socinstr, CH-4002 Basel, Switzerland
[5] Univ Basel, Socinstr 57, CH-4002 Basel, Switzerland
[6] Int Livestock Res Inst, 30709 Naivasha St, Nairobi 00100, Kenya
[7] Natl Inst Vet Res, 86 Truong Chinh, Hanoi 100000, Vietnam