Data, including clinical, biofluid, genetic, imaging, and neuropathology results from ADNI participants, are shared with approved researchers through the LONI Image and Data Archive (IDA), a secure research data repository. Samples, including genetic material, blood, and brain tissue collected from ADNI participants, are available for analyses, and the biospecimen requests are managed by the Resource Allocation Review Committee (RARC)s and the National Institute on Aging (NIA).