5.Aune D, et al. Meat consumption and cancer risk: a case-control study in Uruguay. Asian Pac J Cancer Prev. (2009). http://www.ncbi.nlm.nih.gov/pubmed/19640186
6.“Red meat intake and cancer risk: a study in Italy.” Istituto di Ricerche Farmacologiche “Mario Negri”, Milan, Italy. Int J Caner. 2000 May 1;86(3):425-8. http://www.ncbi.nlm.nih.gov/pubmed/10760833
7.Zhang S, Hunter DJ, Forman MR, Rosner BA, Speizer FE, Colditz GA, Manson JE, Hankinson SE, Willett WC. Dietary carotenoids and vitamins A, C, and E and risk of breast cancer. J Natl Cancer Inst. 1999 Mar 17;91(6):547-56. http://www.ncbi.nlm.nih.gov/pubmed/10088626