Affiliation: | ,Department of Internal Medicine,CHA Bundang Medical Center,CHA University,Gyeonggi-do 463-712,South Korea Jun Yong Park,Do Young Kim,Chae Yoon Chon,Seung Up Kim,Department of Internal Medicine,Yonsei University College of Medicine,Seoul 120-752,South Korea Sang Hoon Ahn,Kwang-Hyub Han,Department of Internal Medicine,Yonsei University College of Medicine,Seoul 120-752,South Korea |