http://www.mayoclinic.org/diseases-conditions/gonorrhea/basics/definition/con-20020917
http://www.mayoclinic.org/diseases-conditions/syphilis/basics/definition/con-20021862
http://www.mayoclinic.org/diseases-conditions/mononucleosis/basics/definition/con-20021164
http://www.mayoclinic.org/diseases-conditions/hiv-aids/basics/definition/con-20013732
http://www.mayoclinic.org/diseases-conditions/hemophilia/basics/definition/con-20029824
http://www.mayoclinic.org/diseases-conditions/alzheimers-disease/basics/definition/con-20023871
http://www.mayoclinic.org/diseases-conditions/heart-disease/basics/definition/con-20034056
http://www.mayoclinic.org/diseases-conditions/arthritis/basics/definition/con-20034095
http://www.cdc.gov/std/gonorrhea/STDFact-gonorrhea-detailed.htm
http://www.cdc.gov/std/syphilis/STDFact-Syphilis-detailed.htm
http://my.clevelandclinic.org/disorders/mononucleosis/hic_overview.aspx
http://www.cdc.gov/hiv/statistics/basics/
http://www.cdc.gov/ncbddd/hemophilia/facts.html
http://www.alz.org/alzheimers_disease_what_is_alzheimers.asp
http://www.cdc.gov/heartdisease/facts.htm
http://www.cdc.gov/chronicdisease/resources/publications/aag/arthritis.htm
http://www.slideshare.net/lhattendorf/communicable-and-noncommunicable-disease-33189659
http://kidshealth.org/teen/drug_alcohol/getting_help/hiv_tests.html#
http://www.mayoclinic.org/healthy-living/sexual-health/in-depth/teens-and-sex/art-20045927