5Aigner F, Gruber H, Conrad F, et al. Revised morphology andhemodynamics of the anorectal vascular plexus: impact on the course of hemorrhoidal disease[J]. Int J Colorectal Dis, 2009, 24(1):105-113.
6Fenoglio-Preiser CM, Noffsinger AE, Stemmermann GN, et al. Gastrointestinal Pathology: An Atlas and Text[M].3rd ed. Philadelphia, PA:Lippincott Williams & Wilkins, 2008.744.
7Li SL, Jing FY, Ma LL, et al. Myofibrotic malformation vessels: unique angiodysplasia toward the progression of hemorrhoidal disease[J]. Drug Des Devel Ther, 2015(9):4649-4656.