1. Clinical Medical Colleges, Weifang Medical University, Weifang, Shandong 261053, P.R. China
2. College of First Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250014, P.R. China
3. Department of Oncology, Weifang Traditional Chinese Hospital, Weifang, Shandong 261000, P.R. China