1. School of Basic Medical Sciences, Shandong Second Medical University, Weifang, Shandong 261053, P.R. China
2. Central Laboratory of Binzhou People's Hospital, Binzhou, Shandong 256600, P.R. China
3. School of Clinical Medical Sciences, Shandong Second Medical University, Weifang, Shandong 261053, P.R. China
4. Department of Medical Oncology, Weifang People's Hospital, Weifang, Shandong 261000, P.R. China