- Female patients must be postmenopausal (at least 12 months since last menses), surgically sterile, abstinent, or, if sexually active, be practicing an effective method of birth control (e.g., prescription oral contraceptives, contraceptive injections, intrauterine device, double-barrier method, contraceptive patch, male partner sterilization) before study entry, for the duration of study participation, and for three months after the last infusion of study agent and must have a negative urine or serum pregnancy test within 1 week before beginning treatment on this study and at all specified timepoints throughout the study. Men must be sterilized or agree to use a double-barrier method of birth control and must agree to not donate sperm during the study and for three months after the last infusion of study agent.