00354nas a2200157   4500000000100000000000100001008004100002100001400043700001300057700001200070700001400082245006700096300001200163490000700175022001400182       2013                            d1 aC. Becker1 aC. Meier1 aS. Jick1 aM. Bodmer00aCase-control analysis on metformin and cancer of the esophagus  a1763-700 v24  a0957-5243