1. From the Division of Research and Optimal Patient Care, American College of Surgeons, Chicago, IL (Ma, Peters, Zhang, Christensen, Ko)
2. Department of Surgery, University of Alabama at Birmingham Medical Center, Birmingham, AL (Ma)
3. Department of Surgery, Loyola University Medical Center, Maywood, IL (Peters, Hornor)
4. Department of Surgery, University of Chicago Medical Center, Chicago, IL (Zhang)
5. Sinai Center for Geriatric Surgery, Sinai Hospital, Baltimore, MD (Coleman, Katlic)
6. Department of Surgery, University of California San Francisco, San Francisco, CA (Finlayson)
7. Department of Medicine, Division of Geriatrics, Hospice, and Palliative Medicine, University of Alabama at Birmingham Medical Center, Birmingham, AL (Flood)
8. Department of Surgery, Duke University, Durham, NC (Lagoo-Deenadayalan)
9. Department of Surgery, University of Colorado Denver, Aurora, CO (Robinson)
10. Department of Surgery, Yale University, New Haven, CT (Rosenthal)
11. Division of Geriatrics, Department of Medicine, University of California San Francisco, San Francisco, CA (Tang)
12. Department of Surgery, University of California, Los Angeles, Los Angeles, CA (Ko, Russell).