00307nas a2200133   4500000000100000000000100001008004100002100001200043700001200055245005400067300001200121490000800133022003200141       2005                            d1 aT. Shao1 aY. Yang00aCholecystectomy and the risk of colorectal cancer  a1813-200 v100  a0002-9270 (Print) 0002-9270