1. Department of Anesthesiology and Perioperative Medicine; Penn State Hershey Medical Center; Pennsylvania USA
2. Department of Anesthesia; Toronto Western Hospital; University of Toronto; Toronto Ontario Canada
3. Department of Science Education; Hofstra Northwell School of Medicine; Hempstead New York USA
4. Department of Radiology; Penn State Hershey Medical Center; Pennsylvania USA
5. Department of Neurosurgery; Penn State College of Medicine; Pennsylvania USA