title: The butterfly mystery.
authors.affiliation: Department of Neurology, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India.
authors.forename: Soumya
authors.initials: S
authors.lastname: Sharma
authors.affiliation: Department of Neurology, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India.
authors.forename: Anu
authors.initials: A
authors.lastname: Gupta
authors.affiliation: Department of Neurology, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India.
authors.forename: Gulab
authors.initials: G
authors.lastname: Soni
authors.affiliation: Department of Pathology, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India.
authors.forename: Ravindra K
authors.initials: RK
authors.lastname: Saran
authors.affiliation: Department of Neurosurgery, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India.
authors.forename: Arvind K
authors.initials: AK
authors.lastname: Srivastava
authors.affiliation: Department of Neurology, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India.
authors.forename: Vinod
authors.initials: V
authors.lastname: Puri