1. Department of Radiology, National Defense Medical Center, Taipei, Taiwan, Republic of China.
2. Department of Radiology, Tri-Service General Hospital, 325, Sec 2, Cheng-Kong Rd, Neihu, Taipei, Taiwan, Republic of China.
3. Department of Otolaryngology–Head & Neck Surgery, National Defense Medical Center and Tri-Service General Hospital, Taipei, Taiwan, Republic of China.
4. Department of Information Management, Chung-Hua University, Hsinchu, Taiwan, Republic of China.
5. Department of Pathology, Graduate Institute of Pathology and Parasitology, National Defense Medical Center, Taipei, Taiwan, Republic of China.