[Li, Lifang] Univ South China, Dept Microbiol & Immunol, Hengyang 421001, Peoples R China.
[Xie, Feng; Guo, Yu; Li, Lanfang; Lv, Deguan; Lu, Qixuan; Tang, Guotao; Chen, Linxi] Univ South China, Inst Pharm & Pharmacol, Learning Key Lab Pharmacoprote, Hengyang 421001, Peoples R China.
[Zhang, Zidong] Univ Mississippi, Med Ctr, Dept Microbiol, Jackson, MS 39216 USA.
[Li, Jian] Beijing Hosp, Key Lab Geriatr, Beijing 100730, Peoples R China.
[Li, Jian] Minist Hlth, Beijing Inst Geriatr, Beijing 100730, Peoples R China.