Preoperative radiotherapy combined with total mesorectal excision for resectable rectal cancer. - Kapiteijn,E.; Marijnen,C.A.; Nagtegaal,I.D.; Putter,H.; Steup,W.H.; Wiggers,T.; Rutten,H.J.; Pahlman,L.; Glimelius,B.; van Krieken,J.H.; Leer,J.W.; van de Velde,C.J. (N Engl J Med, 2001)