 2. 200 neurologists who have prescribed an anti-epileptic drug AED at least once in the last 3 months, and who were on the list to which a letter containing the Physicians Guide for TrobaltTM was distributed from across the following countries United Kingdom, Sweden, Denmark, Switzerland, Spain, Slovakia and Norway. At least 75 of the neurologists will have prescribed TrobaltTM. The survey will also aim to include up to 100 neurologists from Germany of which approximately 50 will have prescribed TrobaltTM. 