1. Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO, USA
2. Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO, USA
3. Orthopaedic & Rehabilitation Engineering Center, Marquette University, Milwaukee, WI, USA
4. Rehabilitation Sciences & Technology, Marquette University, Milwaukee, WI, USA
5. Biostatistics, Washington University School of Medicine, St. Louis, MO, USA