1. Pfizer IncNew YorkNYUSA
2. Clinical Neurology Research GroupPeninsula College of Medicine and DentistryPlymouthUK
3. Alzheimer's AssociationChicagoILUSA
4. Johns Hopkins University School of MedicineBaltimoreMDUSA
5. Columbia UniversityNew YorkNYUSA
6. University of CaliforniaSan DiegoCAUSA