1. Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, California, USA.
2. Mechanical Engineering Department, Al Azhar University, Cairo, Egypt.
3. The UC Berkeley–UCSF Graduate Program in Bioengineering, University of California, Berkeley, and University of California, San Francisco, San Francisco, USA.
4. Orthofix Medical, Inc., Lewisville, Texas, USA.