1. Department of Otolaryngology; Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine; Kaohsiung Taiwan
2. Department of Anatomic Pathology; Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine; Kaohsiung Taiwan
3. Department of Neurosurgery; Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine; Kaohsiung Taiwan