1. Section of Plastic Surgery, Dartmouth-Hitchcock Medical Center and Dartmouth Medical School, Lebanon, New Hampshire, Arizona
2. Center for Statistical Consultation and Research, Arizona
3. Division of Plastic and Reconstructive Surgery, Mayo Clinic, Scottsdale, Arizona
4. Section of Plastic Surgery, University of Michigan Health System, Arizona
5. University of Michigan, Ann Arbor; the Division of Plastic Surgery, University of Minnesota, Minneapolis, Arizona
6. Veterans Affairs Center for Practice Management and Outcomes Research, Arizona