1. Department of Anatomical Sciences; School of Medicine; St. George's University; Grenada West Indies
2. Department of Family Medicine; Central Michigan University; Mount Pleasant Michigan
3. Section of Pediatric Neurosurgery; University of Alabama at Birmingham; Birmingham Alabama
4. Department of Radiology; Boston University; Boston Massachusetts
5. Department of Anatomy; Medical School Varmia and Mazuria; Olsztyn Poland