**IMPORTANT!  To participate in the 404 Challenge all participants MUST sign a Data Use Agreement from the LONI website (https://ida.loni.usc.edu/collaboration/access/appApply.jsp?project=ADNI).**
By agreeing to the Competition Rules, participants confirm they have *requested and been granted access to* the ADNI database. Be aware that access may take between 3-5 business days.

See the Data tab for more information.