Department of Otorhinolaryngology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea
*Corresponding author: Min-Hyun Park, MD, Shindaebang-dong 425, Boramae Medical Center, Dongjak-gu, Seoul, Korea. E-mail address: [email protected]
No sponsorships or competing interests have been disclosed for this article.
received April 9, 2009
revised May 7, 2009
accepted June 16, 2009
