Guang-Won Seo, Sang-Hoon Seol, Bo-Min Park, Tae-Jin Kim, Jae-Kyun Kim, Pil-Sang Song, Dong-Kie Kim, Ki-Hun Kim, Yeon Mee Kim, Doo-Il Kim

J Cardiovasc Ultrasound.2014;22(1):40-42.   Published online 2014 March 31     DOI: http://dx.doi.org/10.4250/jcu.2014.22.1.40