1. Department of Nuclear Medicine, the Affiliated Hospital of Qingdao University, Qingdao, Shandong�266003, P.R. China
2. Department of Laboratory Medicine, People's Hospital of Qingdao Shibei District, Qingdao, Shandong�266033, P.R. China
3. Department of Hospital Infection Management, People's hospital of Zhangqiu District, Jinan, Shandong�250200, P.R. China
4. Department of Dermatoloogy, People's hospital of Zhangqiu District, Jinan, Shandong�250200, P.R. China
5. Department of Laboratory Medicine, People's hospital of Zhangqiu District, Jinan, Shandong�250200, P.R. China
6. Department of Laboratory Medicine, Qilu Hospital of Shandong University (Qingdao), Qingdao, Shandong 266035, P.R. China