1. 1Department of Anesthesiology‚ University of California San Diego‚ San Diego‚ California.
2. 2Department of Anesthesiology‚ University of Florida‚ Gainesville‚ Florida.
3. 3Departments of General Anesthesia and Outcomes Research‚ Cleveland Clinic‚ Cleveland‚ Ohio.
4. 4Department of Anesthesiology, Perioperative and Pain Medicine‚ Palo Alto Veterans Affairs‚ Palo Alto‚ California.
5. 5Department of Anesthesiology‚ Walter Reed National Military Medical Center‚ Bethesda‚ Maryland.
6. 6Department of Anesthesiology‚ Naval Medical Center San Diego‚ San Diego‚ California.
7. 7Florida Pain Relief Group‚ Tampa‚ Florida.
8. 8Department of Anesthesiology‚ Johns Hopkins‚ Baltimore‚ Maryland.
9. 9Department of Anesthesiology‚ Wake Forest School of Medicine‚ Winston-Salem‚ North Carolina.
10. 10Department of Outcomes Research‚ Cleveland Clinic‚ Cleveland‚ Ohio.
11. 11Department of Radiology‚ Emory University‚ Atlanta‚ Georgia.
12. 12Departments of Quantitative Health Sciences and Outcomes Research‚ Cleveland Clinic‚ Cleveland‚ Ohio.
13. 13Departments of Quantitative Health Sciences and Outcomes Research, Cleveland Clinic, Cleveland, Ohio.
14. 14Department of Anesthesiology‚ University of California San Diego‚ San Diego‚ California.