1 Department of Otolaryngology, National Cheng Kung University Hospital, Tainan City, Taiwan.
2 Department of Otolaryngology, National Cheng Kung University Hospital, Tainan City, Taiwan; Department of Otolaryngology, Tainan Municipal Hospital, Tainan City, Taiwan. Electronic address: [email protected].
3 Department of Otolaryngology, Tainan Municipal Hospital, Tainan City, Taiwan.
4 Department of Pathology, Tainan Municipal Hospital, Tainan City, Taiwan.