1. University of Puerto Rico School of Medicine San Juan Puerto Rico
2. Department of Anatomical Sciences St. George's University School of Medicine St. George's Grenada
3. Independent Research Worker Sheffield UK
4. Department of Neurosurgery Tulane University School of Medicine New Orleans Louisiana USA
5. Department of Structural & Cellular Biology Tulane University School of Medicine New Orleans Louisiana USA
6. Department of Neurology Tulane University School of Medicine New Orleans Louisiana USA