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Stephan (Steph) R. Targan, M.D., a co-founder of Prometheus Biosciences, is the Director of the Inflammatory Bowel and Immunobiology Research Institute at Cedars-Sinai Medical Center.  Throughout his career, which spans four decades, he has focused his research on identifying drivers of IBD pathogenesis, uncovering novel GI disease targets including TL1A, and treating IBD patients.  He is the author on more than 300 peer-reviewed articles and is a co-founder of Santarus (acquired by Salix Pharmaceuticals) and Prometheus Laboratories.