1. Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
2. Pittsburgh Ortho Spine Research (POSR) Group, University of Pittsburgh, Pittsburgh, Pennsylvania
3. Wolff Center, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
4. Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
5. Department of Orthopaedic Surgery, The Spine Institute of Arizona, Scottsdale, Arizona
6. Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
7. Department of Emergency Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
8. Department of Internal Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
9. Section of Palliative Care and Medical Ethics, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
10. Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
11. Geriatric Research Education and Clinical Center, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, Pennsylvania
12. Center for Health Equity Research and Promotion, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, Pennsylvania