Kyu-Nam Choi, Tae-Hyun Yang, Bong-Soo Park, Hae-Jung Jun, Soo-Jung Lim, Sang-Hoon Seol, Seong-Man Kim, Dae-Kyeong Kim, Doo-Il Kim, Dong-Soo Kim

J Cardiovasc Ultrasound.2008;16(3):90-92.   Published online 2008 September 30     DOI: http://dx.doi.org/10.4250/jcu.2008.16.3.90