1. Department of Otolaryngology-Head and Neck Surgery, The James Cancer Hospital at the Wexner Medical Center of the Ohio State University College of Medicine, Columbus, Ohio, USA;
2. Department of Neurosurgery, All India Institute of Medical Sciences (AIIMS), Jodhpur, Rajasthan, India;
3. Department of Neurological Surgery, The James Cancer Hospital at the Wexner Medical Center of the Ohio State University College of Medicine, Columbus, Ohio, USA;
4. Department of Otolaryngology-Head and Neck Surgery, Tanta University, Tanta, Egypt;
5. Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA;
6. Department of Anatomy, All India Institute of Medical Sciences (AIIMS), Jodhpur, Rajasthan, India