4Xu 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[J].Ann Surg Oncol,2009,16(2):319-326.
5Xu DZ,Geng QR,Long ZJ,et al.Positive lymph node ratio is an in- dependent prognostic factor in gastric cancer after d2 resection regard- less of the examined number of lymph nodes [J].Ann Surg Oncol, 2009,16(9) :319-326.
