1. Department of Veterinary Clinical Sciences University of Minnesota St. Paul Minnesota USA
2. Center for Magnetic Resonance Research University of Minnesota Minneapolis Minnesota USA
3. Department of Radiology University of Minnesota Minneapolis Minnesota USA
4. Division of Biostatistics, School of Public Health University of Minnesota Minneapolis Minnesota USA
5. Center for Excellence in Hip Scottish Rite for Children Dallas Texas USA
6. Department of Orthopedic Surgery UT Southwestern Medical Center Dallas Texas USA