1 Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; Faculty of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.
2 Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
3 Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; Faculty of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; Institute of Education, National Sun Yat-sen University, 70, Lien-Hai Road, Kaohsiung 80424, Taiwan. Electronic address: cmvwu1029@gmail.com.