Advice About Bright Red Blood in Stool. https://www.verywellhealth.com/advice-about-bright-red-blood-in-stool-796937. Accessed December 12, 2018.

Blood in Stool. https://www.webmd.com/digestive-disorders/blood-in-stool. Accessed December 12, 2018.

Patient education: Blood in the stool (rectal bleeding) in adults (Beyond the Basics). https://www.uptodate.com/contents/blood-in-the-stool-rectal-bleeding-in-adults-beyond-the-basics. Accessed December 12, 2018.

Gastrointestinal Bleeding or Blood in the Stool. https://www.hopkinsmedicine.org/healthlibrary/conditions/adult/pediatrics/gastrointestinal_bleeding_22,GastrointestinalBleeding. Accessed December 12, 2018.

10 Possible Causes of Bloody Stool. https://www.verywellhealth.com/causes-of-bloody-stool-1124078. Accessed December 12, 2018.