1. Department of Biochemistry, Osaka Dental University, Hirakata, Osaka 5731121, Japan
2. Department of Biology, Osaka Dental University, Hirakata, Osaka 5731121, Japan
3. Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa 2388580, Japan
4. Department of Laboratory Medicine and Pathology, Center for Immunology, Masonic Cancer Center, University of Minnesota Medical School, Minneapolis, Minnesota 55455, USA