1. Infectious Diseases Clinic, Vedanta Institute of Medical Sciences; Navarangpura Ahmedabad 380009 India
2. Department of Neuropathology; National Institute of Mental Health and Neurosciences; Bangalore India
3. Department of Neurology; Sterling Hospital; Memnagar Ahmedabad India
4. Department of Internal Medicine; Morsani College of Medicine, University of South Florida; Tampa Florida USA