1. Department of Clinical Laboratory Diagnosis, Jinan Central Hospital, Shandong University, Jinan, Shandong 250012, P.R. China
2. Department of Critical Care Medicine, Jinan Zhangqiu Hospital of Traditional Chinese Medicine, Jinan, Shandong 250200, P.R. China
3. Department of Clinical Laboratory Diagnosis, Shandong First Medical University, Jinan, Shandong 250012, P.R. China
4. Medical Research and Laboratory Diagnostic Center, Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250013, P.R. China