TY - JOUR A1 - Schatzkin, A. A1 - Freedman, L.S. A1 - Dawsey, S.M. A1 - Lanza, E. T1 - Interpreting precursor studies: What polyp trials tell us about large-bowel cancer Y1 - 1994 DO - 10.1093/jnci/86.14.1053 JF - Journal of the National Cancer Institute VL - 86 IS - 14 ER -