1. Hemorrhoids: from basic pathophysiology to clinical management;Lohsiriwat;World J Gastroenterol,2012
2. The prevalence of hemorrhoids and chronic constipation. An epidemiologic study;Johanson;Gastroenterology,1990
3. Haemorrhoids in the adult male; a small epidemiological study;Acheson;Guys Hosp Rep,1960
4. The prevalence of hemorrhoids in adults;Riss;Int J Colorectal Dis,2012
5. Approach to hemorrhoids;Lohsiriwat;Curr Gastroenterol Rep,2013