title: The use and limitations of a stratified randomization in surgical adjuvant studies of cancer.
mesh_terms: D000276:Adjuvants, Immunologic; D006801:Humans; D007978:Levamisole / Q000627:therapeutic use*; D008175:Lung Neoplasms / Q000188:drug therapy / Q000601:surgery*; D011379:Prognosis; D011897:Random Allocation; D012107:Research Design / Q000592:standards
chemical_list: D000276:Adjuvants, Immunologic; D007978:Levamisole