Randomized prospective trial comparing ileal pouch-anal anastomosis performed by excising the anal mucosa to ileal pouch-anal anastomosis performed by preserving the anal mucosa. - Reilly,W.T.; Pemberton,J.H.; Wolff,B.G.; Nivatvongs,S.; Devine,R.M.; Litchy,W.J.; McIntyre,P.B. (Ann Surg, 1997)