1. Department of Pharmacological and Pharmaceutical Sciences College of Pharmacy University of Houston Houston TX
2. Covance Madison WI
3. Department of Neurosurgery Houston Methodist Research Institute Houston TX
4. Department of Neurosurgery Thomas Jefferson University Philadelphia PA
5. Department of Neurosurgery University of Texas Health Science Center Houston TX
6. Department of Neurological Surgery Miller School of Medicine University of Miami FL
7. Department of Neurosurgery University of Maryland Baltimore MD
8. Department of Neurosurgery University of Virginia Health System Charlottesville VA
9. Department of Neurosurgery University of Louisville Louisville KY
10. Late colleague Division of Biostatistics University of Texas School of Public Health Houston TX
11. Division of Neurosurgery and Spine Program Toronto Western Hospital University of Toronto ON Canada