[1] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Plast & Reconstruct Surg, Seoul, South Korea
[2] Hallym Univ, Audiol & Speech Pathol Res Inst, Div Speech Pathol & Audiol, Chunchon, South Korea
[3] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Rehabil Med, Seoul, South Korea
[4] Hallym Univ, Audiol & Speech Pathol Res Inst, Dept Speech Pathol & Audiol, Life Sci Hall 8606,39 Hallymdaehak Gil, Chuncheon Si, Kangwon Do, South Korea