1. Office of Medical Student Research , Oklahoma State University College of Osteopathic Medicine at the Cherokee Nation , Tahlequah , OK , USA
2. Office of Medical Student Research , Oklahoma State University Center for Health Sciences , Tulsa , OK , USA
3. Department of Pediatrics , University of Oklahoma School of Community Medicine , Tulsa , OK , USA
4. Department of Internal Medicine , University of Texas Medical Branch , Galveston , TX , USA
5. Department of Psychiatry and Behavioral Sciences , Oklahoma State University Center for Health Sciences , Tulsa , OK , USA