1. Yunnan Tropical and Subtropical Animal Virus Disease Laboratory, Yunnan Animal Science and Veterinary Institute, Kunming, China.
2. People's Hospital of Jinghong City, Jinghong, China.
3. Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, China.
4. The First People's Hospital of Yunnan Province, Kunming, China.