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S3
American Social Health Association website. Available online: http://www.ashastd.org/stdfaqs/syphilis.html

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(2004 Copyright). Human Papillomavirus (HPV) [8 paragraphs]. ARUP's Guide to Clinical Laboratory Testing [On-line testing information]. Available online: http://www.arup-lab.com/guides/clt/tests/clt_302a.jsp#3465668

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(2004 May 4). Revised Cervical Cancer Screening Guidelines Require Reeducation of Women and Physicians [9 paragraphs]. ACOG [On-line news release]. Available online: http://www.acog.org/from_home/publications/press_releases/nr05-04-04-1.cfm

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(2004 Copyright). The High-Risk HPV Test: A Breakthrough in Cervical Cancer Screening [8 paragraphs]. The HPVtest.com [On-line information from Digene Corportaion] Available online: http://www.thehpvtest.com/factsheet.html

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American Cancer Society, ACS News Center, HPV Vaccine Approved; Prevents Cervical Cancer (article date June 8, 2006). Available online

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National Cancer Institute, Human Papillomas Vaccines: Questions and Answers (June 2006-online information). Available at: http://www.cancer.gov/cancertopics/factsheet/risk/HPV-vaccine

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Darragh TM, Winkler B. The ABCs of anal-rectal cytology. CAP Today. College of American Pathologists, May 2004. (Online information) Available at: http://www.cap.org/apps/docs/cap_today/pap_ngc/NGC_analrectalcyto.html

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Palefsky JM, Holly EA, Ralston ML, Jay N. Prevalence and risk factors for human papillomavirus infection of the anal canal in human immunodeficiency virus (HIV)-positive and HIV-negative homosexual men. J Infect Dis 1998;177:361-7.

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American Cancer Society (July 2006) Cancer reference information, Overview: anal cancer, How is cancer found? Available online