1. Department of Neurology Columbia University College of Physicians and Surgeons New York New York USA
2. Department of Neurology Penn State Milton S. Hershey Medical Center Hershey PA 17033
3. Department of Public Health Sciences Pennsylvania State University College of Medicine Hershey PA 17033
4. Taub Institute for Research of Alzheimer's Disease and the Aging Brain Columbia University New York New York USA
5. Gertrude H. Sergievsky Center Columbia University New York New York USA
6. Department of Epidemiology Joseph P. Mailman School of Public Health Columbia University New York New York USA