Comment on

• Cancer etiology. Variation in cancer risk among tissues can be explained by the number of stem cell divisions.

  Tomasetti C, Vogelstein B. Tomasetti C, et al. Science. 2015 Jan 2;347(6217):78-81. doi: 10.1126/science.1260825. Science. 2015. PMID: 25554788 Free PMC article.
• Cancer risk: role of chance overstated.

  Wild C, Brennan P, Plummer M, Bray F, Straif K, Zavadil J. Wild C, et al. Science. 2015 Feb 13;347(6223):728. doi: 10.1126/science.aaa6799. Epub 2015 Feb 5. Science. 2015. PMID: 25656657 No abstract available.
• Cancer risk: tumors excluded.

  Potter JD, Prentice RL. Potter JD, et al. Science. 2015 Feb 13;347(6223):727. doi: 10.1126/science.aaa6507. Epub 2015 Feb 5. Science. 2015. PMID: 25656658 No abstract available.
• Cancer risk: prevention is crucial.

  Gotay C, Dummer T, Spinelli J. Gotay C, et al. Science. 2015 Feb 13;347(6223):728. doi: 10.1126/science.aaa6462. Epub 2015 Feb 5. Science. 2015. PMID: 25656659 No abstract available.
• Cancer risk: role of environment.

  Ashford NA, Bauman P, Brown HS, Clapp RW, Finkel AM, Gee D, Hattis DB, Martuzzi M, Sasco AJ, Sass JB. Ashford NA, et al. Science. 2015 Feb 13;347(6223):727. doi: 10.1126/science.aaa6246. Epub 2015 Feb 5. Science. 2015. PMID: 25678650 No abstract available.
• Cancer risk: many factors contribute.

  Song M, Giovannucci EL. Song M, et al. Science. 2015 Feb 13;347(6223):728-9. doi: 10.1126/science.aaa6094. Epub 2015 Feb 5. Science. 2015. PMID: 25678651 No abstract available.
• Cancer risk: accuracy of literature.

  O'Callaghan M. O'Callaghan M. Science. 2015 Feb 13;347(6223):729. doi: 10.1126/science.aaa6212. Epub 2015 Feb 5. Science. 2015. PMID: 25678652 No abstract available.