Izaak Walton Killam Hospital for University of Alberta, Edmonton Children, Halifax Women's College Hospital, Toronto Jewish General Hospital, Montreal Maisonneuve-Rosemont Hospital, Mammography Screening Montreal Facilities Manitoba Cancer Foundation, Associated Radiologists of Winnipeg Saskatoon McGill University Department of Baker Street X-Ray and Ultrasound, Oncology, Montreal Guelph, ON Montreal Children's Hospital County of Bruce General Hospital, Montreal General Hospital Walkerton, ON Mount Sinai Hospital, Toronto Hanover and District Hospital, ON Northeastern Ontario Regional Listowel Memorial Hospital, ON Cancer Center, Sudbury N.S. Breast Screening Clinic, Halifax NCIC-Clinical Trials Group, Kingston Radiology Associates, Red Deer