[1] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Seoul, South Korea
[2] Univ S Dakota, Sanford Sch Med, Sanford Res USD, Canc Biol Res Ctr, Sioux Falls, SD USA
[3] Natl Canc Ctr, Dept Otolaryngol, Head & Neck Oncol Clin, Goyang, Gyeonggi Do, South Korea