Pelvic irradiation with concurrent chemotherapy versus pelvic and para-aortic irradiation for high-risk cervical cancer: an update of radiation therapy oncology group trial (RTOG) 90 - 01. - Eifel,P.J.; Winter,K.; Morris,M.; Levenback,C.; Grigsby,P.W.; Cooper,J.; Rotman,M.; Gershenson,D.; Mutch,D.G. (J Clin Oncol, 2004)