Won Jae Lee, Chang Woo Son, Jun Cheol Yoon, Hyun Su Jo, Jang Won Son, Kyu Hwan Park, Sang Hee Lee, Dong Gu Shin, Geu-Ru Hong, Jong Seon Park, Young Jo Kim

J Cardiovasc Ultrasound.2010;18(4):151-153.   Published online 2010 December 31     DOI: http://dx.doi.org/10.4250/jcu.2010.18.4.151