[1] Rush Univ, Med Ctr, Dept Otolaryngol Head & Neck Surg, Chicago, IL 60612 USA
[2] Illinois Masonic Med Ctr, Dept Otolaryngol, Adv Ctr Specialty Care Advocate, Chicago, IL 60657 USA
[3] Chang Gung Univ, Chang Gung Mem Hosp, Kaohsiung Med Ctr, Coll Med,Dept Otolaryngol, Kaohsiung, Taiwan
[4] Natl Sun Yat Sen Univ, Dept Biol Sci, Kaohsiung 80424, Taiwan