Cetuximab Recruiting Phase 1 / 2 Trials for Stage IIIB Colorectal Cancer AJCC v8 / Stage IIIC Colorectal Cancer AJCC v8 / Recurrent Colorectal Carcinoma / Metastatic Microsatellite Stable Colorectal Carcinoma / Unresectable Colon Adenocarcinoma / BRAF NP_004324.2:p.V600E / Stage III Colorectal Cancer AJCC v8 / Progressive Disease / Stage IV Colorectal Cancer AJCC v8 / Metastatic Colon Adenocarcinoma / Unresectable Rectal Adenocarcinoma / Metastatic Rectal Adenocarcinoma / Stage IIIA Colorectal Cancer AJCC v8 / Stage IVB Colorectal Cancer AJCC v8 / Stage IVA Colorectal Cancer AJCC v8 / Stage IVC Colorectal Cancer AJCC v8 Treatment