1. Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, IA, USA
2. Department of Orthopaedics, Phramongkutklao Hospital, Bangkok, Thailand
3. Department of Orthopaedics, University of North Carolina, Chapel Hill, NC, USA
4. Department of Engineering, University of Rochester, Rochester, NY, USA
5. Department of Orthopaedic Surgery, Clinical Las Condes, Santiago, Chile
6. Department of Orthopaedic Surgery, Duke University, Durham, NC, USA