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Trend in overall guideline adherence (blue), adequate lymphadenectomy (regional lymph nodes examined ≥ 15) among patients who received guideline recommended surgery (black), and peri-operative chemotherapy or chemoradiation among patients who received guideline recommended surgery (red) over time. Dotted vertical line (2007) represents the first year which pre-operative chemotherapy included in NCCN guideline recommended treatment for locally advanced gastric cancer.
