1. WHO WPRO Regional Polio Reference Laboratory, National Laboratory for Poliomyelitis and National Health Commission Key Laboratory for Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People’s Republic of China
2. Tibet Center for Disease Control and Prevention, Lhasa City, People’s Republic of China
3. Center for Biosafety Mega-Science, Chinese Academy of Sciences, Beijing, People’s Republic of China