Department of Otolaryngology, Chang Gung Memorial Hospital, Chang Gung University, Taipei, Taiwan
2.Department of Otolaryngology, Cathay General Hospital, Taipei, Taiwan (PCW) Fu Jen Catholic University School of Medicine, Taipei County, Taiwan PCW) Department of Public Health, College of Public Health, China Medical University, Taichung, Taiwan
3.Division of Otology, Department of Otolaryngology Head & Neck Surgery, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
4.Department of Otolaryngology, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
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