National Comprehensive Cancer Network. Rectal cancer clinical practice guidelines in oncology
Engstrom PF, Benson AB 3rd, Chen YJ, Choti MA, Dilawari RA, Enke CA, Fakih MG, Fuchs C, Kiel K, Knol JA, Leong LA, Ludwig KA, Martin EW Jr, Rao S, Saif MW, Saltz L, Skibber JM, Venook AP, Yeatman TJ. National Comprehensive Cancer Network. Rectal cancer clinical practice guidelines in oncology. J Natl Compr Canc Netw. 2005; 3:492-508.