Document Type : Original Article
Authors
1 National Drug Clinical Trial Institution of Women and Children’s Hospital, Qingdao University, No. 6 Tongfu Road, Shibei District, Qingdao City, Shandong Province, China.
2 Department of Immunology, Basic Medical College of Qingdao University, No.308 Ningxia Road, Shinan District, Qingdao City, Shandong Province, China.
3 Department of Hospital Infection Control, Qingdao Municipal Hospital, No.5 Donghai Middle Road, Shinan District, Qingdao City, Shandong Province, China.
Keywords