High Local Recurrence Risk After Breast-Conserving Therapy in Node-Negative Premenopausal Breast Cancer Patients Is Greatly Reduced by One Course of Perioperative Chemotherapy: A European Organization for Research and Treatment of Cancer Breast Cancer Cooperative Group StudyPaula H.M. Elkhuizen, P C Clahsen, L.C.J.M. van den Broek et al.|Journal of Clinical Oncology|2000Cited by 73