From the Departments of *Orthopaedic Surgery and ‡Neurosurgery, Medical University of South Carolina, Charleston, South Carolina; †Veterans Administration San Diego Healthcare System, University of California, San Diego; the §Department of Orthopaedic Surgery, Jefferson University, Philadelphia, Pennsylvania, the ∥Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, the ¶Department of Orthopaedic Surgery, Cleveland Clinic, Ohio; and the #Rand Health Sciences Program, Santa Monica, California.
Supported in part by the Sepulveda Field Program/Veterans Administration Center for the Study of Provider Behavior, Health Services Research Service, Department of Veterans' Affairs.
Dr. Bozzette is an Health Services Research and Development Senior Research Associate of the Department of Veterans Affairs.
Acknowledgment date: February 25, 1997.
First revision date: June 12, 1997.
Acceptance date: September 12, 1997.
Device status category: 1.
Address reprint requests to: John A. Glaser, MD; Department of Orthopaedic Surgery; Medical University of South Carolina; 708 CSB; 171 Ashley Ave.; Charleston, SC 29425; E-mail: [email protected].