1. Department of Neurologic Surgery; Mayo Clinic; Rochester Minnesota
2. Department of Anatomical Sciences; School of Medicine, St. George's University; Grenada West Indies
3. Department of Surgery; St Joseph Mercy Oakland Hospital; Pontiac Michigan
4. Department of Anatomy; Medical School Varmia and Mazuria; Olsztyn Poland
5. Department of Anatomy; Victor Babes University of Medicine and Pharmacy; Timisoara Romania
6. Pediatric Neurosurgery; Children's Hospital; Birmingham Alabama