7Aylor RH,Hay JH,Larsson SN,et al. Transanal local excision of selected low rectal cancers[J].Am Surg,1998,175(6):360.
8Willet CG,Compton CC,Shellito PC,et al. Selection factors for local excision or abdominol perineal resecion of early stage rectal cancer[J]. Cancer,1994,73(11):2716.