Affiliation: | (1) First Department of Medicine, Osaka University Medical School, Fukushima 1-1-50, Fukushima-ku, Osaka 553, Japan;(2) Research Foundation for Microbial Diseases of Osaka University, Kannonji, Kagawa 768, Japan;(3) Department of Molecular Genetics, Research Institute for Microbial Diseases of Osaka University, Suita, Osaka 565, Japan |