1. Department of Surgery and Bioengineering, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
2. Cellartis AB, Göteborg, Sweden.
3. AG Experimentelle Chirurgie, BCRT, Charité—Universitätsmedizin Berlin, Berlin, Germany.
4. Department of Pittsburgh Development Center, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.