1. Statistical Research and Application Branch, Cancer Control and Population Sciences, National Cancer Institute. Available at: http://srab.cancer.gov/devcan/ . [Last accessed: December 1, 2004.]
2. Memorial Sloan-Kettering Cancer Center. Available at: http://www.mskcc.org/ . [Last accessed: December 1, 2004.]
3. University of Texas Southwestern Medical Center at Dallas. Available at: http://www3.utsouthwestern.edu/cancergene/ . [Last accessed: December 1, 2004.]
4. Breast Cancer Risk Assessment Tool. National Cancer Institute. Available at: http://bcra.nci.nih.gov/ . [Last accessed: December 1, 2004.]
5. Your Disease Risk. The Source on Prevention. The Harvard Center for Cancer Prevention. Available at: http://www.yourdiseaserisk.harvard.edu/hccpquiz.pl?func=show&page=cancer_index/ . [Last accessed: December 1, 2004.]