[1] Seoul Natl Univ, Bundang Hosp, Dept Radiol, Div Cardiovasc Imaging, 300 Gumi Dong, Songnam 463707, Gyeonggi Do, South Korea
[2] Seoul Natl Univ, Dept Radiol, Seoul Metropolitan Govt, Boramae Med Ctr, Seoul, South Korea
[3] Cheju Halla Coll, Dept Tourism English, Gen English Educ Sect, Jeju City, South Korea
[4] Seoul Natl Univ, Bundang Hosp, Dept Nucl Med, Songnam 463707, Gyeonggi Do, South Korea
[5] Korea Univ, Anam Hosp, Dept Nucl Med, Seoul, South Korea
[6] Seoul Natl Univ, Bundang Hosp, Dept Internal Med, Div Cardiol, Songnam 463707, Gyeonggi Do, South Korea