1. Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
2. Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
3. Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
4. Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
5. Division of Regenerative Medicine, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan.