1. Department of Neurosurgery, Bangabandhu Sheikh Mujib Medical University, Dhaka 1000, Bangladesh
2. Department of Neurosurgery, Neurosurgery Clinic, Birgunj 44300, Nepal
3. Department of Neurosurgery, Khulna Medical College, Khulna 9100, Bangladesh
4. Radiation Oncology Unit, Department of Radiotherapy, REM Radioterapia Srl, 95029 Viagrande, Italy
5. Department of Neurosurgery, National Institute of Neuroscience, Dhaka 1207, Bangladesh