title: Authors' Reply.
authors.affiliation: Department of Neurology, Tuticorin Medical College, Thoothukudi, Tamil Nadu, India.
authors.forename: Sri
authors.initials: S
authors.lastname: Ramakrishnan
authors.affiliation: Department of Neurology, Tuticorin Medical College, Thoothukudi, Tamil Nadu, India.
authors.forename: Balakrishnan
authors.initials: B
authors.lastname: Kannan
authors.affiliation: Department of Medicine, Sundaram Arulrhaj Hospitals, Tuticorin, Tamil Nadu, India.
authors.forename: Aarathy
authors.initials: A
authors.lastname: Kannan
authors.affiliation: Department of Neurology, Appusami Hospital, Salem, Tamil Nadu, India.
authors.forename: E Prasanna
authors.initials: EP
authors.lastname: Venkatesan