From the Department of Cardiovascular Medicine (M.K., K.E., S.K., W.N., H.S., A.T.), Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; the Second Department of Pathology (M.T.), Kumamoto University School of Medicine, Kumamoto, Japan; and the Immunopathology Section (T.Y.), Laboratory of Immunobiology, National Cancer Institute, Frederick, Md. (At 2000-10-31)