Table of Contents

1 Front Matter; 2 Summary; 3 1 Introduction; 4 2 Background, Definitions, Concepts; 5 3 What We Have Learned from Current Approaches to Studying Environmental Risk Factors; 6 4 Challenges of Studying Environmental Risk Factors for Breast Cancer; 7 5 Examining Mechanisms of Breast Cancer Over the Life Course: Implications for Risk; 8 6 Opportunities for Action to Reduce Environmental Risks for Breast Cancer; 9 7 Recommendations for Future Research; 10 Appendix A: Agendas for Public Meetings; 11 Appendix B: Biographical Sketches of Committee Members; 12 Appendix C: Classification Systems Used in Evidence Reviews; 13 Appendix D: Summary Table on Estimates of Population Attributable Risk; 14 Appendix E: Glossary; 15 Appendix F: Ionizing Radiation Exposure to the U.S. Population, with a Focus on Radiation from Medical Imaging