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Dr. Armstrong brings over 25 years’ experience in drug discovery and development to Prometheus Biosciences.  Prior to Prometheus, Dr. Armstrong was Vice President of Research at Retrophin, a commercial stage company focused on expansion of their rare disease pipeline; Chief Scientific Officer at Patara Pharma, a small clinical-stage company focused on inflammatory and fibrotic disease; Ambit Biosciences where he held positions of increasing responsibility over ten years focused on the discovery and preclinical development of kinase inhibitors for cancer and inflammation. Dr. Armstrong’s other positions include those at Chiron Corporation and a career initiating eleven-years at Idun Pharmaceuticals.  He earned his PhD in Neurobiology from SUNY Stony Brook.