Inclusion Criteria:

- Patients, with primary breast cancer who had undergone complete primary tumor
resection and axillary lymph node dissection

- Evidence of minimal residual disease (disseminated tumor cells in bone marrow)

- Patients had to receive one of the following adjuvant therapy categories:
chemotherapy ± hormonal therapy or hormonal therapy alone

Exclusion Criteria:

- Inflammatory, metastatic or recurrent breast cancer or a history of breast cancer
prior to the currently diagnosed case

- Neo-adjuvant chemotherapy, neo-adjuvant hormonal therapy, or neo-adjuvant
radiotherapy

- Prior stem cell rescue/bone marrow transplant

- History of other cancers aside from non-melanomatous skin cancer or carcinoma in situ
of the uterine cervix

Additional protocol-defined inclusion / exclusion criteria may apply