http://patients.gi.org/topics/common-gi-symptoms/
https://www.cdc.gov/cancer/colorectal/sfl/index.htm
http://www.ccfa.org/
https://www.asge.org/home/for-patients/patient-information
https://gastro.org/practice-guidance/gi-patient-center/
https://gastro.org/practice-guidance/gi-patient-center/diet-and-medication
