APPROACHES TO CANCER PREVENTION IN PRACTICE Bernard Levin GENETIC SUSCEPTIBILITY TO TOBACCO CARCINOGENESIS Margaret R. Spitz DIETARY PREVENTION OF CANCER WITH FOCUS ON DIGESTIVE TRACT NEOPLASMS Carlo La Vecchia HORMONES AND CANCER Karen A. Johnson ENVIRONMENT AND CANCER Paolo Boffetta COLON CANCER GENETICS Stephen B. Gruber PHYSICAL ACTIVITY AND CANCER Leslie Bernstein SCREENING CONCEPTS Gad Rennert ETHICAL ISSUES IN SCREENING FOR CANCER Michael Baum BIOMARKERS AND SCREENING: TOO MANY BIOMARKERS, BUT A FEW VALIDATED TESTS Sudhir Srivastava BREAST CANCER SCREENING- SOME CURRENT ISSUES Stephen W. Duffy CHEMOPREVENTIVE CONCEPTS Frank L. Meyskens Jr. BIOMARKERS IN COLORECTAL CANCER CHEMOPREVENTION Robert S. Bresalier, NSAIDs IN COLON CHEMOPREVENTION Dean E. Brenner PREVENTION OF ESTROGEN RECEPTOR NEGATIVE BREAST CANCER Powel Brown IBIS II STUDY FOR BREAST CANCER PREVENTION Jack Cuzick SCREENING FOR COLORECTAL CANCER (CRC) Wendy Atkin BIOMARKERS IN SCREENING David F. Ransohoff SCREENING FOR PROSTATE CANCER: THE U.K. PROTECT TRIAL Michael Baum BREAST CANCER PREVENTION - THE STAR STUDY Leslie G. Ford HORMONAL BREAST CANCER PREVENTION IN CHILDREN Jaak Ph. Janssens COX 2 INHIBITORS IN COLON CANCER PREVENTION. Nadir Arber CHEMOPREVENTION OF LUNG CANCER: LESSONS FROM CARET, THE BETA-CAROTENE AND RETINOL EFFICACY TRIAL Gilbert S. Omenn