%0 Journal Article %T Circulating tumour cells and cell-free DNA in gastrointestinal cancer %A Pantel, Klaus %A Alix-Panabières, Catherine %J Nature Reviews Gastroenterology & Hepatology %V 14 %N 2 %P 73-74 %@ 1759-5045 %D 2017-01-18 %I Nature Publishing Group UK %~ DeepDyve