26.Huncharek M, Muscat J, Kupelnick B. Dairy products, dietary calcium and vitamin D intake as risk factors for prostate cancer: a meta-analysis of 26,769 cases from 45 observational studies. Nutr Cancer 2008;60(4):421-41. http://www.ncbi.nlm.nih.gov/pubmed/18584476
27.Heitkamp HC, Jelas I. Epidemiological evidence for preventing prostate cancer by physical activity. [Article in German] Wien Med Wochenschr. 2012 Dec;162(23-24):533-40. http://www.ncbi.nlm.nih.gov/pubmed/23065019
28.Barnard , James R., Tung H. Ngo, Pak-Shan Leung, William J. Aronson, and Lawrence A. Golding. A Low-Fat Diet and/or Strenuous Exercise Alters the IGF Axis In Vivo and Reduces Prostate Tumor Cell Growth In Vitro. The Prostate 56:201-206 May 2003. http://www.ncbi.nlm.nih.gov/pubmed/12772189