1. Departments of Medicine and Clinical Science (M.T., F.O., K.I., J.S., H.Mak.), Okayama University Graduate School of Medicine and Dentistry, Okayama City 700-8558, Japan
2. Department of Cardiovascular Medicine (K.N., D.M., H.F., H.Mat., T.O.), Okayama University Graduate School of Medicine and Dentistry, Okayama City 700-8558, Japan
3. Departments of Cancer and Thoracic Surgery (H.D.), Okayama University Graduate School of Medicine and Dentistry, Okayama City 700-8558, Japan