1. Department of Internal Medicine, Institute of Wonkwang Medical Science, Wonkwang University School of Medicine, Iksan, Korea.
2. Department of Radiology, Institute of Wonkwang Medical Science, Wonkwang University School of Medicine, Iksan, Korea.
3. Department of Laboratory Medicine, Institute of Wonkwang Medical Science, Wonkwang University School of Medicine, Iksan, Korea.