[1] Natl Taiwan Univ Hosp, Dept Internal Med, Taipei 100, Taiwan
[2] Buddhist Dalin Tzu Chi Gen Hosp, Dept Otolaryngol, Chiayi, Taiwan
[3] Tzu Chi Univ, Sch Med, Hualien, Taiwan
[4] Natl Taiwan Univ, Coll Med, Grad Inst Clin Med, Taipei 10764, Taiwan
[5] Natl Taiwan Univ Hosp, Dept Otolaryngol, Taipei 100, Taiwan
[6] Natl Taiwan Univ, Res Ctr Dev Biol & Regenerat Med, Taipei 10764, Taiwan