1. University of Washington Medical Center, 1959 NE Pacific St, Seattle, WA 98195, USA
2. Department of Neurology, MedStar Georgetown University Hospital, Washington, DC, USA
3. StudyMetrix Research, St Peters, MO, USA
4. Novartis Pharmaceuticals Corporation, East Hanover, NJ, USA
5. Amgen Inc., Thousand Oaks, CA, USA