NCT03365882 2026-02-10S1613, Trastuzumab and Pertuzumab or Cetuximab and Irinotecan Hydrochloride in Treating Patients With Locally Advanced or Metastatic HER2/Neu Amplified Colorectal Cancer That Cannot Be Removed by SurgerySWOG Cancer Research NetworkPhase 2 Completed240 enrolled 14 charts