1. Department of Surgery, Duke University School of Medicine, Durham, NC 27710, USA
2. Department of Neurosurgery, Yale University, New Haven, CT 06510, USA
3. Department of Neurosurgery, Duke University Medical Center, Durham, NC 27710, USA
4. Medical Center Library & Archives, Duke University School of Medicine, Durham, NC 27710, USA
5. Department of Surgery, Loyola University Chicago’s Stritch School of Medicine, Maywood, IL 60153, USA
6. Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC 27707, USA
7. Division of Adult Cardiothoracic Surgery, Department of Surgery, UCSF Health, San Francisco, CA 94143, USA