Hemorrhoids .http://www.mayoclinic.org/diseases-conditions/hemorrhoids/basics/definition/con-20029852. Accessed July 14, 2016.
Hemorrhoids .http://www.niddk.nih.gov/health-information/health-topics/digestive-diseases/hemorrhoids/Pages/facts.aspx. Accessed July 14, 2016.
Hemorrhoids .http://familydoctor.org/familydoctor/en/diseases-conditions/hemorrhoids.printerview.all.html. Accessed July 14, 2016.
Hemorrhoids .https://www.nlm.nih.gov/medlineplus/ency/article/000292.htm. Accessed July 14, 2016.