1. Division of Health Care Policy and Research, Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota, USA
2. Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, Minnesota, USA
3. Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, Minnesota, USA
4. Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota, USA
5. Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
6. Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA