1. Division of Rhinology, Department of OtolaryngologyChang Gung Memorial Hospital and Chang Gung University Taoyuan Taiwan
2. Department of Otolaryngology–Head and Neck SurgeryChang Gung Memorial Hospital and Chang Gung University Keelung Taiwan
3. the Graduate Institute of Clinical Medical SciencesCollege of Medicine, Chang Gung University Taoyuan Taiwan
4. Department of Anatomic PathologyChang Gung Memorial Hospital and Chang Gung University Taoyuan Taiwan
5. Department of RadiologyChang Gung Memorial Hospital and Chang Gung University Keelung Taiwan