| 1 | http://seer.cancer.gov/statfacts/html/cervix.html |
| 2 | http://www.cdc.gov/od/oc/media/pressrel/r060629.htm |
| 3 | http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5602a1.htm |
| 4 | http://www.cdc.gov/std/hpv |
| 5 | http://www.nlm.nih.gov/medlineplus/hpv.html |
| 6 | http://www.nlm.nih.gov/medlineplus/cervicalcancer.html |
| 7 | http://www.fda.gov/cber/vaccines.htm |