1. Anorectal conditions: hemorrhoids;Fox;FP Essent,2014
2. Burden of digestive diseases in the United States part II: lower gastrointestinal diseases;Everhart;Gastroenterology,2009
3. Pathophysiology of internal hemorrhoids;Margetis;Ann Gastroenterol,2019
4. The prevalence of hemorrhoids and chronic constipation. An epidemiologic study;Johanson;Gastroenterology,1990
5. Associations between hemorrhoids and other diagnoses;Delcò;Dis Colon Rectum,1998