1. Irish College of General Practitioners; General Practice; Dunlavin County Wicklow Ireland
2. University College London Institute of Neurology; Department of Clinical Neurosciences; Royal Free Campus Rowland Hill Street London UK NW2 3PF
3. Monash University; Department of Paediatrics; Clayton Victoria Australia 3168
4. National Hospital for Neurology and Neurosurgery; MRC Centre for Neuromuscular Diseases; PO Box 114 London UK WC1N 3BG
5. Hopital Erasme, Université Libre de Bruxelles; Neurology Department; Route de Lennik 808 Brussels Belgium 1070