1. Clarian Neuroscience Institute, Indianapolis Neurosurgical Group, Department of Neurosurgery, Indiana University, Indianapolis, Indiana
2. Pediatric Neurosurgery, Children's Hospital, Birmingham, Alabama
3. Medical Ethics and History of Medicine Research Center, Tabriz University (Medical Sciences), Tabriz, Iran
4. Department of Anatomical Sciences, St. George's University, Grenada, West Indies