NCT03358472 2025-12-03Pembrolizumab Plus Epacadostat, Pembrolizumab Monotherapy, and the EXTREME Regimen in Recurrent or Metastatic Head and Neck Squamous Cell Carcinoma (KEYNOTE-669/ECHO-304)Incyte CorporationPhase 3 Completed89 enrolled 14 charts
NCT02358031 2025-07-18MK-3475-048Merck Sharp & Dohme LLCPhase 3 Completed882 enrolled 50 charts 1 FDA