Gi Byoung Nam, June Soo Kim, Sun Soo Park, Kyung Il Han, O Yeol Ryoo, Cheol Ho Kim, Myoung Mook Lee, Young Bae Park, Yun Shik Choi, Jung Don Seo, Young Woo Lee

Korean Circ J.1991;21(5):870-880.   Published online 1991 October 31     DOI: http://dx.doi.org/10.4070/kcj.1991.21.5.870