The interaction between N-category and N-ratio as a new tool to improve lymph node metastasis staging in gastric cancer: results of a single cancer center in Brazil.
Eur J Surg Oncol. 2011 Jan;37(1):47-54. doi: 10.1016/j.ejso.2010.11.002. Epub 2010 Nov 27.
Eur J Surg Oncol. 2011.
PMID: 21115234