[1] Seoul Natl Univ, Bundang Hosp, Dept Ophthalmol, Coll Med, Songnam 463707, Gyunggi Do, South Korea
[2] Seoul Natl Univ, Coll Med, Seoul Natl Univ Hosp, Dept Ophthalmol, Songnam 463707, Gyunggi Do, South Korea
[3] Seoul Natl Univ, Bundang Hosp, Dept Internal Med, Coll Med, Songnam 463707, Gyunggi Do, South Korea