Can the addition of radiotherapy postoperatively increase clinical outcome of patients with gastric cancer? A systematic review of the literature and meta-analysis.

Oncotarget · 2018 · PMC5828196 · PMID 29535839

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highly significantno p-value reported

Already in 2001, MacDonald [ 4 ] demonstrated a highly significant survival advantage to adjuvant therapy.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.