[1] Guangzhou Med Univ, Guangzhou Women & Childrens Med Ctr, Guangzhou 510120, Guangdong, Peoples R China
[2] Sun Yat Sen Univ, Inst Human Virol, Zhongshan Sch Med, Guangzhou 510080, Guangdong, Peoples R China
[3] Guangzhou Med Univ, Guangdong Prov Key Lab Allergy & Clin Immunol, Sino French Hoffmann Inst,Sch Basic Med Sci, State Key Lab Resp Dis,Qingyuan Peoples Hosp, Guangzhou 511436, Guangdong, Peoples R China