1. Extremity Trauma and Regenerative Medicine Task Area, United States Army Institute of Surgical Research, San Antonio, Texas.
2. Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee.
3. Wake Forest Institute of Regenerative Medicine, Winston-Salem, North Carolina.
4. Department of Orthopaedics and Rehabilitation and Center for Bone Biology, Vanderbilt University, Nashville, Tennessee.