Prasad Kameshwar, Kaul Subhash, Padma M V, Gorthi S P, Khurana Dheeraj, Bakshi Asha
Department of Neurology, All India Institute of Medical Sciences, New Delhi, India.
Ann Indian Acad Neurol. 2011 Jul;14(Suppl 1):S82-96. doi: 10.4103/0972-2327.83084.