Stapled hemorrhoidectomy - cost and effectiveness. Randomized, controlled trial including incontinence scoring, anorectal manometry, and endoanal ultrasound assessments at up to three months. - Ho,Y.H.; Cheong,W.K.; Tsang,C.; Ho,J.; Eu,K.W.; Tang,C.L.; Seow-Choen,F. (Dis Colon Rectum, 2000)