title: When is a new test a valid test?
mesh_terms: D000328:Adult; D019411:Clinical Laboratory Techniques / Q000191:economics*; D003092:Colitis / Q000097:blood*; D004724:Endoscopy; D006801:Humans; D009113:Muramidase / Q000097:blood*
chemical_list: D009113:Muramidase