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Lymph node ratio is an independent prognostic factor in gastric cancer after curative resection (R0) regardless of the examined number of lymph nodes. Am J Clin Oncol. 2013 Aug;36 (4):325-30.","DOI":"10.1097\/COC.0b013e318246b4e9"},{"key":"38","doi-asserted-by":"crossref","unstructured":"38. Xu DZ, Geng QR, Long ZJ, et al. Positive lymph node ratio is an independent prognostic factor in gastric cancer after d2 resection regardless of the examined number of lymph nodes. Ann Surg Oncol. 2009 Feb;16 (2):319-26.","DOI":"10.1245\/s10434-008-0240-4"},{"key":"39","doi-asserted-by":"crossref","unstructured":"39. Moug SJ, Oliphant R, Balsitis M, et al. The lymph node ratio optimises staging in patients with node positive colon cancer with implications for adjuvant chemotherapy. 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