1. Net Health Systems , Inc., Pittsburgh, Pennsylvania, USA
2. MaccabiTech Institute for Research and Innovation , Maccabi Healthcare Services, Tel-Aviv, Israel
3. MidSouth Orthopaedic Rehabilitation , Cordova, Tennessee, USA
4. Department of Health Services , Policy and Practice, School of Public Health, Brown University Providence, Rhode Island, USA
5. Research , Providence VA Medical Center, Providence, Rhode Island, USA