1. Surgical Outcomes and AnalysisKaiser Permanente San Diego CA
2. Australian Orthopaedic Association National Joint Replacement Registry Adelaide South Australia Australia
3. Healthcare Policy and ResearchWeill Cornell Medical College New York City NY
4. Department of Mathematics and StatisticsSan Diego State University San Diego CA
5. Computational Science Research CenterSan Diego State University San Diego CA
6. Department of Surgery Epworth HealthCareUniversity of Melbourne Melbourne Victoria Australia