1 Departments of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
2 Departments of Neurosurgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
3 Departments of Pathology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
4 Departments of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; School of Medicine, National Yang-Ming University, Taipei, Taiwan. Electronic address: pinghonglai@gmail.com.