1. From the First Department of Internal Medicine (T.S., N.N., Y.S., J.N., T.M., H.T., T.A., Y.T., I.K.) and First Department of Pathology (K.M., M.Y.), Yamagata University School of Medicine, Yamagata; Sagae City Hospital, Sagae (S.Y.); and Department of Host Defense, Research Institute for Microbial Diseases, Osaka University, Osaka (O.T., S.A.), Japan.