1. Division of Experimental Surgery, Department of Surgery, Charité–Universitätsmedizin Berlin Campus Virchow-Klinikum, Berlin, Germany.
2. Berlin Brandenburg Center of Regenerative Therapies (BCRT), Charité–Universitätsmedizin Berlin Campus Virchow-Klinikum, Berlin, Germany.
3. Departments of Surgery and Bioengineering, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.