1. From the Departments of Cardiovascular Physiology and Medicine (Y.H., C.G., D.J., T.U., K.N., M.Y.), Medicine and Molecular Science (T.H., H.T., S.N., J.S., K.C.), and Oral and Maxillofacial Radiology (A.T.), Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan.