1. Department of Biomedical EngineeringNational Cerebral and Cardiovascular Center Research Institute Kishibe Shin‐machi Suita Osaka Japan
2. Faculty of Chemistry, Materials and BioengineeringKansai University 3‐3‐35 Yamatecho, Suita, Osaka Japan
3. Registered Institution for Facilities Use PromotionJapan Synchrotoron Radiation Research Institute (JASRI) Sayo‐gun Hyogo Japan
4. Department of Biobased Materials ScienceKyoto Institute of Technology Kyoto Japan