The Effect of Primary Tumor Site on Survival in Metastatic Colorectal Cancer Patients and their Relation to KRAS and Biological Therapy Research Authors AM Mohamed, TZ Mahran, GA Abdelrazik, DA Gamal Research Date Sun, 1 Jan 2023 - 12:00 Research Department Department of Clinical Oncology and Nuclear Medicine Research Journal SECI Oncology Journal Research Member Gehad Ahmed Abdelrazik Ahmed