title: How close are we to finding noninvasive markers for upper GI tract cancer?
authors: Richard J E
authors: RJ
authors: Skipworth
authors: Holger
authors: H
authors: Husi
authors: James A
authors: JA
authors: Ross
mesh_terms: D014408:Biomarkers, Tumor; D005770:Gastrointestinal Neoplasms / Q000175:diagnosis*; D006801:Humans; D011379:Prognosis; D041742:Upper Gastrointestinal Tract
chemical_list: D014408:Biomarkers, Tumor