1. Department of Orthopaedic Surgery, Spine Surgery Unit, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
2. Department of Neurosurgery, Ibrahim Cardiac Hospital and Research Institute, Dhaka, Bangladesh
3. Department of Neurosurgery,, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
4. Neurosurgery Clinic, Birgunj, Nepal
5. James Cook University Hospital, Middlesborough, UK
6. Department of Neurosurgery, King Edward Memorial Hospital and Seth G. S. Medical College, Mumbai, India