1. First Department of Pathology, Kansai Medical University, Moriguchi‐City, Osaka, Japan
2. Transplantation Center, Kansai Medical University, Sakyo‐ku, Kyoto, Japan
3. First Department of Internal Medicine, Kansai Medical University, Sakyo‐ku, Kyoto, Japan
4. Department of Biotechnology, Kyoto Institute of Technology, Sakyo‐ku, Kyoto, Japan
5. The Jackson Laboratory, Bar Harbor, Maine, USA
6. First Department of Internal Medicine, Yamagata University School of Medicine, Iida‐Nishi, Yamagata, Japan