http://www.catie.ca/en/search/apachesolr_search/HPV
CDC
http://www.cdc.gov/std/hpv/stdfact-hpv.htm
McGill University
http://www.mcgill.ca/hitchcohort/hpvfacts
The HPV and Anal Cancer Foundation
http://www.analcancerfoundation.org/learn/hpv/
UCSF
http://id.medicine.ucsf.edu/analcancerinfo/hpv/
The International Anal Neoplasia Society
P.O. Box 1543 Leesburg, Virginia 20177
info@iansociety.org