1. Cell Sheet Tissue Engineering Center (CSTEC), Department of Pharmaceutics and Pharmaceutical Chemistry, Health Sciences, University of Utah, 30 South 2000 East, Salt Lake City, Utah 84112, U.S.A.
2. Department of Biomedical Engineering, University of Utah, 36 S. Wasatch Drive SMBB 3100, Salt Lake City, UT 84112, U.S.A.
3. Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, TWIns, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan