1. Stem Cell Biology Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, Louisiana.
2. Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, Louisiana.
3. Division of Plastic and Reconstructive Surgery, Department of Surgery, Tulane University School of Medicine, New Orleans, Louisiana.
4. Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina.