1. Spine Disorders Unit, Institute of Orthopaedics and Traumatology, Rajiv Gandhi Government General Hospital and Madras Medical College, Chennai-3, Tamilnadu, India
2. Department of Orthopaedics and Traumatology, Government Mohan Kumaramangalam Medical College and Superspeciality Hospital, Salem, Tamilnadu, India
3. Department of Orthopaedics, Institute of Orthopaedics and Traumatology, Rajiv Gandhi Government General Hospital and Madras Medical College, Chennai-3, Tamilnadu, India