title: Extended lymph node dissection in gastric cancer: if a benefit exists, can it ever be proven?
authors: M J
authors: MJ
authors: Heslin
mesh_terms: D005743:Gastrectomy; D006801:Humans; D008197:Lymph Node Excision; D013274:Stomach Neoplasms / Q000601:surgery*; D015996:Survival Rate