1. Department of Thoracic, Cardiac and Vascular Surgery, University Hospital, Tuebingen, Germany.
2. Cell and Tissue Systems, Inc., North Charleston, South Carolina.
3. Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia.
4. Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, South Carolina.
5. Department of Thoracic, Cardiac, and Thoracic Vascular Surgery, University Hospital Frankfurt am Main, Germany.