[1] Foshan Univ, Sch Life Sci & Engn, Foshan, Peoples R China
[2] Qingdao Municipal Ctr Dis Control & Prevent, Qingdao, Peoples R China
[3] Qingdao Univ, Affiliated Hosp, Dept Nosocomial Infect Control, Qingdao, Peoples R China
[4] Univ Illinois, Dept Med, Div Pulm Crit Care Sleep & Allergy, Chicago, IL USA
[5] Foshan Univ, Sch Life Sci & Engn, Foshan 528225, Peoples R China
[6] Qingdao Univ, Affiliated Hosp, Dept Nosocomial Infect Control, Qingdao 266071, Peoples R China
[7] Univ Illinois, Dept Med, Chicago, IL 60612 USA