Sources

-http://iocdf.org/about-ocd/treatment/

-http://psychcentral.com/disorders/sx25t.htm

-http://www.mayoclinic.org/diseases-conditions/ocd/basics/risk-factors/con-20027827

-http://familydoctor.org/familydoctor/en/diseases-conditions/obsessive-compulsive-disorder/causes-risk-factors.html