1. Department of Physical Therapy, School of Allied Health Professions, Loma Linda University, Loma Linda, CA, USA
2. Department of Orthopedic Physical Therapy, Cairo University, Cairo, Egypt
3. Epidemiology, Biostatistics, and Population Medicine, School of Public Health, Loma Linda University, Loma Linda, CA, USA
4. School of Allied Health Professions, Loma Linda University, Loma Linda, CA, USA
5. Department of Orthopedic Surgery, Loma Linda University, Loma Linda, CA, USA