1. University of Maryland School of Medicine, Baltimore, MD, USA
2. Vanderbilt University Medical Center, Nashville, TN, USA
3. Weill Cornell Medicine, New York, NY, USA
4. Muhimbili Orthopaedic Institute, Dar es Salaam, Tanzania
5. Vanderbilt University School of Medicine, Nashville, TN, USA
6. Hospital General de Catalunya, Sant Cugat, Spain