1 Department of Otolaryngology, Hualien Tzu Chi Hospital, No. 707, Sec. 3, Chung-Yang Road, Hualien 970, Taiwan, Republic of China.
2 Department of Radiology, Kaohsiung Veterans General Hospital, No. 386, Ta-Chung 1st Road, Kaohsiung 813, Taiwan, Republic of China.
3 Department of Radiology, Kaohsiung Veterans General Hospital, No. 386, Ta-Chung 1st Road, Kaohsiung 813, Taiwan, Republic of China; Department of Medical Imaging and Radiology, Shu-Zen Junior College of Medicine and Management, Kaohsiung, Taiwan, Republic of China; Department of Medical Imaging and Radiology Science, Central Taiwan University of Science and Technology, No.666, Buzih Road, Beitun District, Taichung City 406053, Taiwan, Republic of China.
4 Department of Medical Imaging and Radiology, Shu-Zen Junior College of Medicine and Management, No. 452, Huanqiu Road, Luzhu District, Kaohsiung City, 821, Taiwan, Republic of China.
5 Department of Radiology, Kaohsiung Veterans General Hospital, No. 386, Ta-Chung 1st Road, Kaohsiung 813, Taiwan, Republic of China; Department of Medical Imaging and Radiology, Shu-Zen Junior College of Medicine and Management, Kaohsiung, Taiwan, Republic of China.