1. Department of Oncology, Affiliated Tengzhou Central People's Hospital of Jining Medical University, Tengzhou, Shandong 277599, P.R. China
2. Medical Image Center, Affiliated Tengzhou Central People's Hospital of Jining Medical University, Tengzhou, Shandong 277599, P.R. China
3. College of Animal Sciences and Technology, Qingdao Agricultural University, Qingdao, Shandong 266109, P.R. China