Kalyan Kumar Varma Kalidindi1, Jeevan Kumar Sharma2. 1. Department of Spine Service, Indian Spinal Injuries Centre, Vasant Kunj, New Delhi, India, 110070. kalyan_varma_mbbs@yahoo.com. 2. Department of Spine Service, Indian Spinal Injuries Centre, Vasant Kunj, New Delhi, India, 110070.