Hello @EHRChallengeParticipants, We have finished Round 1 and have begun Round 2! The final round results and leaderboard for Round 1 will be announced soon. We have two announcements, (1) the release of version 3 of the fast lane synthetic data and (2) the release of a list of concepts that are available in the UW Challenge Data. ###Synthetic Data You can download the [synthetic data here](https://www.synapse.org/#!Synapse:syn20685954). This version of the synthetic data will be used on the Fast Lane to validate submissions. Version 3 of the synthetic data corrects for some previous discrepancies between version 2 and the UW data. - We have added null values to any columns for which the UW data also has null values. The distribution of the null values is similar to that of the UW data. If a column is 90% null in the synthetic data, you can assume that the column in the UW data is approximately that empty as well. - We have corrected for the datetime/date issue where those two columns were not the same date in many of the tables. - We have also made sure that all datetimes have a time associated with them with the notable exception of the *procedure occurrence* table. UW procedures don't currently have times associated with them so the procedure_datetime column is just the dates. The synthetic data reflects this characteristic of the UW data. - We have removed some extra columns such as "Unnamed: 0" and "observation_concept_i" that found their way into the previous versions. ###Concept lists We have also released a list of all concept_ids that occur in at least 100 patients in the UW Challenge data. Each clinical table has its own list of concepts, concept descriptions, and vocabulary_id. You can download the [zip file of the lists and accompanying README here](https://www.synapse.org/#!Synapse:syn21116682) as well as look up each of the concepts up at http://athena.ohdsi.org/ for more information. If you have questions or concerns, or you notice some problems with either of these resources, feel free to leave a comment in this discussion thread. Thank you very much and good luck, EHR DREAM Admin Team