4. For Part 2 patients only: History of other clinically active malignancy within 5 years of enrollment, except for tumors with a negligible risk for metastasis or death, such as adequately controlled basal-cell carcinoma or squamous-cell carcinoma of the skin or carcinoma in situ of the cervix or breast, or early stage endometrial cancer (stage IA/B, Grade 1 or 2, endometrioid histology).