1. Patients must have met the inclusion criteria for the preceding double-blind SOFIA Study, and must have completed at least 10 weeks of treatment in the 14 week SOFIA study or have withdrawn from the SOFIA study due to worsening of clinical symptoms (i.e. a CGI-I-AD of 6 or 7 which, in the Investigator's opinion, required alternative intervention except symptoms of activation which could not be ameliorated by reduction in dose).