1. Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
2. Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India.
3. Department of Dentistry, Government Medical College, Chandigarh, India.
4. Department of Radiotherapy, Postgraduate Institute of Medical Education and Reserach, Chandigarh, India.