Consulting Fees: Dr. Randal Bateman reports grants from the NIH and an Anonymous Foundation during the conduct of the study. Outside the submitted work, Dr. Bateman reports grants from the Alzheimer's Association, American Academy of Neurology, an Anonymous Foundation, AstraZeneca, the BrightFocus Foundation, the Cure Alzheimer’s Fund, The Glenn Foundation for Medical Research, Merck, the Metropolitan Life Foundation, the NIH, the NIA, NINDS, the DIAN Pharma Consortium (Biogen Idec, Elan Pharmaceuticals Inc., Eli Lilly and Co., Hoffman La-Roche Inc., Genentech Inc., Janssen Alzheimer Immunotherapy, Mithridion Inc., Novartis Pharma AG, Pfizer Biotherapeutics R and D, Sanofi-Aventi, Eisai), and the Ruth K. Broadman Biomedical Research Foundation. He reports non-financial support from Avid Radiopharmaceuticals, stock and part ownership of C2N Diagnostics. He has consulted for Roche, IMI, Sanofi, the Global Alzheimer's Platform, FORUM, Boehringer Ingelheim, Merck, and OECD.