1. Berlin Brandenburg Center for Regenerative Therapies (BCRT), Charité-Universitäts Medizin Berlin, Division of Experimental Surgery, Berlin, Germany.
2. Department of Surgery, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
3. Allegheny Reproductive Health Center, Pittsburgh, Pennsylvania.
4. Regenerative Medicine and Cell Therapy Unit, ISMETT—Mediterranean Institute for Transplantation and Advanced Specialized Therapies, Palermo, Italy.