1. Foot & Ankle Division, Department of Orthopaedic Surgery, John Peter Smith Hospital, Fort Worth, TX 76104, USA
2. Department of Orthopaedic Surgery, Bone & Joint Institute, University of North Texas Health Science Center, Fort Worth, TX 76104, USA
3. Department of Materials Science and Engineering, University of North Texas, Denton, TX 76107, USA
4. Department of Orthopaedic Surgery, John Peter Smith Hospital, Fort Worth, TX 76104, USA