4Thomson WHF. The nature of hemorrhoids[J]. Br J Surg, 1975, 62:542-552.
5Longo A. Treatment of hemorrhoids disease by reduction of mucosa and hemorrhoids prolapse with a circular suturing device:a new procedure.Proceeding of the sixth world congress of endoscopic surgery[J]. Rome Italy, 1998, 7: 782-784.
6Marino AW Jr.Anorectal surgery hemorrhoids[J].Dis Colon Rectum,1980,23:211~222.
7Goligher J.Surgery of the anus,rectum,andcolon[M].5th ed.London:Bailliere Tindall,1984.564.
8Longo A.Treatment of hemorrhoids disease by reduction of mucosa and hemorrhoidal prolapse with a circular suturing device:a new procedure[M].6th ed.Rome:World Congress of Endoscopic Surgery,1998.777.
9Thomson WHF.The nature of haemorrhoids[J].Br J Surg,1975,62:542.
10LONGO A. Treatment of heamorrhoids disease by reduction of mucosa and heamorrhoidal. Prolaps with a circular. Suturing. Device: a new procedure[C].proceedings of the 6th world congress of endoscopic Surgery Rome. Italy, June, 1998. 3-6.