Dr. Mark Pimentel is a professor of medicine and gastroenterology at Geffen School of Medicine UCLA and associate professor of medicine at Cedars-Sinai Medical Center, Los Angeles. He is also the executive director of the Medically Associated Science and Technology (MAST) Program at Cedars-Sinai, https://csmast.com. A pioneering expert in irritable bowel syndrome (IBS), Dr. Pimentel's research led to the first-ever blood tests for IBS, https://ibssmart.com. Dr. Pimentel has served as a principal