title: Lost in validation.
mesh_terms: D015415:Biomarkers / Q000032:analysis*; D014408:Biomarkers, Tumor / Q000032:analysis*; D002986:Clinical Trials as Topic; D005069:Evaluation Studies as Topic; D006801:Humans; D009369:Neoplasms / Q000175:diagnosis* / Q000378:metabolism*; D010818:Practice Patterns, Physicians' / Q000639:trends*
chemical_list: D015415:Biomarkers; D014408:Biomarkers, Tumor