Departments of *Internal Medicine
†Microbiology, Chung-Ang University College of Medicine
‡Cell Biotech, Co., Ltd., Seoul, Republic of Korea
Supported in part by research funds from Cell Biotech, Co., Ltd, Korea.
Bong Ki Cha and Seung Mun Jung contributed equally to this study.
The authors declare that they have nothing to declare.
Reprints: Chang Hwan Choi, MD, PhD, Department of Internal Medicine, Chung-Ang University College of Medicine, 224-1 Heukseok-dong, Dongjak-gu, Seoul, Republic of Korea 156-755 (e-mail: [email protected]).
Received February 23, 2011
Accepted September 11, 2011