Baheti N N, Sreedharan M, Krishnamoorthy T, Nair M D, Radhakrishnan K
Department of Neurology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum-695011, Kerala, India.
J Neurol Neurosurg Psychiatry. 2008 Mar;79(3):271. doi: 10.1136/jnnp.2007.122093.