1. Department of Public Heath, Independent University-Bangladesh, Dhaka, Bangladesh
2. Neurosurgery Service, Imperial College Healthcare NHS Trust, London, UK
3. Department of Neurosurgery, Bangladesh Medical College Hospital, Dhaka, Bangladesh
4. Department of Neurosurgery, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
5. Neurosurgery Department, Dhaka Medical College, Dhaka, Bangladesh
6. Neurosurgery Department, Holy Family Red Crescent Medical College, Dhaka, Bangladesh