1 Pediatric Neurology and Neurodevelopmental Unit, Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India.
2 Department of Ophthalmology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
3 Department of Radiodiagnosis, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
4 Pediatric Neurology and Neurodevelopmental Unit, Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India. doctorpratibhasinghi@gmail.com.