1. Department of Radiology, Anhui Provincial Hospital Affiliated to Anhui Medical University, Hefei, Anhui 230001, China
2. Department of Radiation Oncology, Anhui Provincial Hospital Affiliated to Anhui Medical University, Hefei, Anhui 230001, China
3. Bengbu Medical College, Bengbu, Anhui 233030, China
4. Department of Radiology, The First Affiliated Hospital of University of Science and Technology of China, Hefei, Anhui 230001, China