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A, Flow diagram showing patient selection and final study cohort using study inclusion and exclusion criteria. B, Flow diagram showing study cohorts by pathologic nodal status, broken down by concordance with appropriate National Comprehensive Cancer Network guidelines for adjuvant therapy following surgery, defined as chemotherapy for pathologic N1 disease, and chemotherapy (chemo) with or without radiation (RT) for pN2 disease. AJCC, American Joint Committee on Cancer.
