title: Letter: Serum muramidase activity in untreated cancer.
mesh_terms: D003110:Colonic Neoplasms / Q000097:blood*; D006801:Humans; D009113:Muramidase / Q000097:blood*; D012004:Rectal Neoplasms / Q000097:blood*
chemical_list: D009113:Muramidase