Authors: Doo Sun Sim; Myung Ho Jeong; Song Choi; Nam Sik Yoon; Hyun Ju Yoon; Jae Youn Moon; Young Joon Hong; Kye Hun Kim; Hyung Wook Park; Ju Han Kim; Youngkeun Ahn; Jeong Gwan Cho; Jong Chun Park; Jung Chaee Kang Journal: Korean Circ J Date: 2009-04-28 Impact factor: 3.243