1. Regenerative Orthopedics Laboratory, Department of Orthopedics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
2. Steadman Philippon Research Institute, Vail, Colorado, USA.
3. Sports Medicine, Hip Preservation, Department of Orthopedics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
4. Department of Orthopaedic Surgery, Wakamatsu Hospital for the University of Occupational and Environmental Health, Kitakyushu, Japan.
5. Adult Reconstruction, Adolescent and Young Adult Hip Service, Orthopaedics Department, Washington University, St Louis, Missouri, USA.