1. Fujian Provincial Key Laboratory of Reproductive Health Research, Department of Obstetrics and Gynecology, Women and Children's Hospital, School of Medicine, Xiamen University , Xiamen , Fujian 361002 , China
2. State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University , Xiamen , Fujian 361002 , China
3. Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University , Yangzhou , Jiangsu 225009 , China
4. Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University , Yangzhou , Jiangsu , China