1. La Tour Hospital; University of Geneva; Geneva University Hospitals, Switzerland
2. The San Antonio Orthopaedic Group; University of Texas Health Science Center, San Antonio, Texas, USA
3. Geneva University Hospitals, Switzerland
4. Mermoz Hospital, Lyon, France
5. Centre Hospitalier Privé Saint-Grégoire, Saint- Grégoire, France
6. St Francis Memorial Hospital, San Francisco, USA
7. Southern Oregon Orthopedics, Medford, Oregon, USA