[Luo, Dan; Wang, Li; Liao, Yating; Yan, Xiaoliang; Zeng, Yanhua; Li, Lingling] Univ South China, Hengyang Med Coll, Hunan Prov Key Lab Special Pathogens Prevent & Co, Inst Pathogen Biol,Hunan Prov Cooperat Innovat Ct, Hengyang 421001, Peoples R China.
[Liu, Haican; Wan, Kanglin] Chinese Ctr Dis Control & Prevent, State Key Lab Infect Dis Prevent & Control, Natl Inst Communicable Dis Control & Prevent, Beijing 102206, Peoples R China.
[Yi, Xiaomei] Univ South China, Affiliated Hosp 1, Reprod Med Ctr, Hengyang 421001, Peoples R China.