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Imaging Science-Based Lung and Bone Diseases Research Center, ‡Department of Anatomy, School of Medicine, §Department of Oral Physiology, School of Dentistry, ⊥Department of Radiology, School of Medicine, ∥Institute for Skeletal Disease, and ▽Division of Rheumatology, Department of Internal Medicine, Wonkwang University , Iksan, Jeonbuk 570-749, Korea.