Comment on

• Light at night, shiftwork, and breast cancer risk.

  Hansen J. Hansen J. J Natl Cancer Inst. 2001 Oct 17;93(20):1513-5. doi: 10.1093/jnci/93.20.1513. J Natl Cancer Inst. 2001. PMID: 11604468 No abstract available.
• Night shift work, light at night, and risk of breast cancer.

  Davis S, Mirick DK, Stevens RG. Davis S, et al. J Natl Cancer Inst. 2001 Oct 17;93(20):1557-62. doi: 10.1093/jnci/93.20.1557. J Natl Cancer Inst. 2001. PMID: 11604479
• Rotating night shifts and risk of breast cancer in women participating in the nurses' health study.

  Schernhammer ES, Laden F, Speizer FE, Willett WC, Hunter DJ, Kawachi I, Colditz GA. Schernhammer ES, et al. J Natl Cancer Inst. 2001 Oct 17;93(20):1563-8. doi: 10.1093/jnci/93.20.1563. J Natl Cancer Inst. 2001. PMID: 11604480