Dear @AntiPD1ResponseDREAMChallengeParticipants , Today marks the start of the Validation Phase and you may now start submitting your models for scores! As a reminder, your team gets **5 total submissions per Sub-challenge** during this phase. Returned scores are the bootstrapped estimates, which you can view on the [Leaderboard](https://www.synapse.org/#!Synapse:syn18404605/wiki/608352) page (they will also be emailed to you). The Validation Phase will close on Thur, Feb. 25th, at 12AM Eastern Time. Best of luck, and if you have any questions, please do not hesitate to use the Discussion forum to ask them. Best, @AntiPD1ResponseDREAMChallengeOrganizers