1. Shanghai Veterinary Research Institute, Chinese Academy of Agriculture Sciences, Shanghai, China
2. Quantitative Veterinary Epidemiology, Animal Sciences Group, Wageningen University & Research, Lelystad, the Netherlands
3. Wageningen Bioveterinary Research, Wageningen University & Research, Lelystad, the Netherlands
4. Laboratory of Virology, Plant Science Group, Wageningen University & Research, Lelystad, the Netherlands