1. Spine Surgery Unit, Department of Orthopaedic Surgery, Bangabandhu Sheikh Mujib Medical University, Shahbag, Dhaka 1000, Bangladesh
2. Department of Neurosurgery, Ibrahim Cardiac Hospital and Research Institute, Shahbag, Dhaka 1000, Bangladesh
3. Department of General Anaesthesiology, Ibrahim Cardiac Hospital and Research Institute, Shahbag, Dhaka 1000, Bangladesh
4. Neurosurgical Clinic, AOUP “Paolo Giaccone”, Post Graduate Residency Program in Neurologic Surgery, Department of Experimental Biomedicine and Clinical Neurosciences, School of Medicine, University of Palermo, 90133 Palermo, Italy
5. Department of Neurosurgery, Bangabandhu Sheikh Mujib Medical University, Shahbag, Dhaka 1000, Bangladesh
6. Department of Neurosurgery, Trauma Center, Gamma Knife Center, Cannizzaro Hospital, 95126 Catania, Italy
7. Department of Neurosurgery, Neurosurgery Clinic, Birgunj 44300, Nepal