1. College of First Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250014, P.R. China
2. Cancer Center, Weifang Traditional Chinese Hospital, Weifang, Shandong 261000, P.R. China
3. College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250014, P.R. China