[1] Natl Taiwan Univ Hosp, Dept Otolaryngol, Taipei, Taiwan
[2] Taipei Hosp, Dept Otolaryngol, Dept Hlth, New Taipei City, Taiwan
[3] Natl Taiwan Univ Hosp, Sleep Ctr, Taipei, Taiwan
[4] Natl Taiwan Univ Hosp, Dept Internal Med, Taipei 100, Taiwan
[5] Natl Taiwan Univ Hosp, Dept Pediat, Taipei 10016, Taiwan