1. Doll R, Peto R (1981) The causes of cancer: quantitative estimates of avoidable risks of cancer in the United States today. J Natl Cancer Inst 66:1191–1308
2. Colditz G, DeJong D, Hunter DJ, Trichopoulos D, Willett WC (1996) Harvard report on cancer prevention. Volume 1: causes of human cancer. Cancer Causes Control 7(Suppl 1):S3–59
3. (1997) Harvard report on cancer prevention. Volume 2: prevention of human cancer. Cancer Causes Control 8(Suppl 1):1–50. http://www.jstor.org/stable/i284404
4. Colditz GA, Sellers TA, Trapido E (2006) Epidemiology—identifying the causes and preventability of cancer? Nat Rev Cancer 6(1):75–83
5. Colditz G, DeJong D, Hunter DJ, Trichopoulos D, Willett WC (1996) Harvard report on cancer prevention. Volume 1: causes of human cancer, summary. Cancer Causes Control 7(Suppl 1):S55–S58