1. Department of Oncology, Yuhuangding Hospital, Yantai, Shandong, 264000, P. R. China
2. Department of Pathology, Shandong University School of Medicine, Jinan, Shandong, 250012, P. R. China
3. Department of Rehabilitation, Qianfoshan Hospital, Jinan, Shandong, 250014, P. R. China
4. Department of Radiology, Taian Central Hospital, Taian, Shandong, 271000, P. R. China