1. Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
2. Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
3. Research Network and Facility Services Division, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
4. Department of Diagnostic Pathology, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan