1. San Francisco General Hospital, University of California in San Francisco, 2550 Twenty-third Street, Building 9, 2nd Floor, San Francisco, CA 94110, United States of America (USA).
2. University of Florida, Gainesville, USA.
3. Orthopaedic Trauma Institute, University of California, San Francisco, USA.
4. Institute for Global Orthopaedics and Traumatology, University of California, San Francisco, USA.
5. School of Public Health, University of California, Berkeley, USA.