1. Office of Medical Student Research, Oklahoma State University Center for Health Sciences, Tulsa, OK, USA
2. Arkansas Colleges of Health Education, College of Osteopathic Medicine, Fort Smith, AR, USA
3. Department of Psychiatry and Behavioral Sciences, Oklahoma State University Center for Health Sciences, Tulsa, OK, USA
4. Department of Medical Education, Oklahoma State University Center for Health Sciences, Tulsa, OK, USA
5. Samuel J. Wood Library & C. V. Starr Biomedical Information Center, Weill Cornell Medical College, New York, NY, USA
6. Department of Statistics, Oklahoma State University, Stillwater, OK, USA