8. Patients who have been treated with any of the following within 4 weeks before start of study treatment: chemotherapies, immunotherapies, radiotherapies (within 2 weeks before start of study treatment for local palliative radiotherapies for the treatment of brain metastasis or extremities), biological therapies, molecular-targeted therapies, hormonal therapies for breast cancer within 2 weeks before start of study treatment, or treatment with other investigational drugs.