1. Janakpuri Superspecialty Hospital; Department of Neurology; C-2/B, Janakpuri New Delhi Delhi India 110058
2. National Hospital for Neurology and Neurosurgery; MRC Centre for Neuromuscular Diseases; PO Box 114 Queen Square London UK WC1N 3BG
3. Charing Cross Hospital; Neuromuscular Unit 3 North; Fulham Palace Road London UK W6 8RF