In this episode of the Collaboratory Grand Rounds podcast, Dr. George Hripcsak, Chair of the Bioinformatics Department at Columbia University, discusses the Observational Health Data Sciences and Informatics (OHDSI) Program with moderator Dr. Adrian Hernandez.  He describes the Program's vision to create accessible and reliable clinical evidence by gathering the clinical data of millions of patients globally. Dr. Hripcsak also talks about how listeners can "Join the Journey" and become part of the OHDSI research network, and help toward the generating high quality evidence needed to inform medical decision making.