1. Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California.
2. Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California.
3. Department of Plastic and Hand Surgery, Technical University, Munich, Munich, Germany.
4. Department of Dermatology, Stanford University School of Medicine, Stanford, California.