1 Department of Orthopedics, LSUHSC-Shreveport, 1501 Kings Highway, Shreveport, LA, 71103, USA.
2 Mallinckrodt Institute of Radiology, Washington University School of Medicine, 510 S. Kingshighway Blvd, Campus Box 8131, St. Louis, MO, 63110, USA. davidballard@wustl.edu.
3 Department of Rehabilitation Sciences in the School of Allied Health Professions, LSUHSC-Shreveport, 1501 Kings Highway, Shreveport, LA, 71103, USA.
4 Department of Radiology, LSUHSC-Shreveport, 1501 Kings Highway, Shreveport, LA, 71103, USA.