Department of Otorhinolaryngology−Head and Neck Surgery, Soonchunhyang University College of Medicine, Bucheon, South Korea
*Corresponding author: Dr. Jae Yong Lee, 1174 Jung-Dong, Wonmi-Gu, Bucheon-Si, Gyeonggi-Do, 420–767, South Korea. E-mail address: [email protected].
No sponsorships or competing interests have been disclosed for this article.
Received May 10, 2010; revised May 30, 2010; accepted June 7, 2010.
