The acting persons and institutions in this clinical path are the breast cancer patients, the hospitals, the family doctors or gynaecologists, and a QL-study team. Starting point is the QL-assessment either in the hospital or in doctors' practice (EORTC QLQ-C30 plus BR-23). The caring physician documents the patients' health status. Based on these two pieces of information, the QL-study team writes up a medical/QL-opinion plus therapy recommendation. This report is sent to the caring physician. The effectiveness of the therapy recommendation is assessed in the following QL-assessment. This clinical path is implemented via three interrelated methods of implementation: local opinion leaders, outreach visits, and quality circle.