Mukesh Kalra1, Sudhir Mahapatra2, Mohit Kumar Patralekh3, R K Kanojia4. 1. Professor of Orthopaedics, Lady Hardinge Medical College and Associated Hospitals, University of Delhi, Delhi, India. 2. Senior Resident, Lady Hardinge Medical College and Associated Hospitals, University of Delhi, Delhi, India. 3. Medical Officer, Central Health Services, C1/160-161, 2nd Floor, Sector 16, Rohini, Delhi 110089, India. 4. Director, Professor of Orthopaedics, Lady Hardinge Medical College and Associated Hospitals, University of Delhi, Delhi, India.