1. Department of NeurologyBoston University School of MedicineBostonMAUSA
2. Department of Health Behavior & Health EducationUniversity of Michigan School of Public HealthAnn ArborMIUSA
3. Departments of Neurology and MedicineUniversity of Washington Medical SchoolSeattleWAUSA
4. Department of EpidemiologyBoston University School of Public HealthBostonMAUSA
5. Department of BiostatisticsBoston University School of Public HealthBostonMAUSA
6. Data Coordinating CenterBoston University School of Public HealthBostonMAUSA
7. Genetics ProgramDepartment of MedicineBoston University School of MedicineBostonMAUSA