1. Dental and Craniofacial Research Institute, University of California, Los Angeles, Los Angeles, California, USA
2. Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California, USA
3. Department of Orthopaedic Surgery, Orthopaedic Hospital/ University of California, Los Angeles, Los Angeles, California, USA
4. Orthopaedic Hospital Research Center, Orthopaedic Hospital/University of California, Los Angeles, Los Angeles, California, USA
5. Private practice, Marina del Rey, California, USA
6. Division of Plastic and Reconstructive Surgery, University of Southern California, Los Angeles, California, USA
7. Department of Bioengineering, University of California, Los Angeles, Los Angeles, California, USA
8. Center for Cardiovascular Science and MRC Center for Regenerative Medicine, University of Edinburgh, Edinburgh, United Kingdom