1. Department of Neurosurgery, Narayana Medical College Hospital, Chinthareddypalem, Nellore, Andhra Pradesh (India)
2. Department of Pathology, Narayana Medical College Hospital, Chinthareddypalem, Nellore, Andhra Pradesh (India)
3. Department of Pulmonology, Narayana Medical College Hospital, Chinthareddypalem, Nellore, Andhra Pradesh (India)