1 From the Departments of Neurological Sciences (A.M., A.S., A.G., A.T.P., V.M.), Pathology (S.R.), Radiology (P.M.), and Haematology (A.J.D.), Christian Medical College, Vellore, Tamil Nadu, India.
2 From the Departments of Neurological Sciences (A.M., A.S., A.G., A.T.P., V.M.), Pathology (S.R.), Radiology (P.M.), and Haematology (A.J.D.), Christian Medical College, Vellore, Tamil Nadu, India. ajiths@cmcvellore.ac.in.