1. Department of Neurosurgery, McGovern Medical School at the University of Texas Health Science Center at Houston, Houston
2. Department of Cardiothoracic and Vascular Surgery, McGovern Medical School at the University of Texas Health Science Center at Houston, Houston
3. University of Texas Health Science Center at Houston School of Public Health, Houston
4. Center for Clinical and Translational Sciences, McGovern Medical School at the University of Texas Health Science Center at Houston, Houston
5. Department of Surgery, Baylor College of Medicine, Houston, Texas
6. Department of Surgery, McGovern Medical School at the University of Texas Health Science Center at Houston, Houston