Additional Relevant Details  Incyte Corporation today announced that the first patient has been treated in the ECHO-301 study—a Phase 3 trial evaluating epacadostat, Incyte’s investigational, highly potent and selective oral IDO1 inhibitor, in combination with Keytruda (pembrolizumab), Merck’s anti-PD-1 therapy, as first-line treatment for patients with advanced or metastatic melanoma. Incyte expects initial data from the ECHO-301 study to be available in 2018.