Harsh Deora1, Manjul Tripathi2, Bipin Chaurasia3, J André Grotenhuis4. 1. Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bangalore, India. demo5601@gmail.com. 2. Department of Neurosurgery, Post Graduate Institute of Medical Education and Research, Chandigarh, India. 3. Department of Neurosurgery, Bangladesh Medical College and University, Dhaka, Bangladesh. 4. Radboud University Medical Centre, Nijmegen, The Netherlands.