7. Female subjects of child bearing potential with a negative serum pregnancy test prior to entry into the study and who are practicing an adequate method of birth control (e.g., surgical sterilization, oral or parenteral contraceptives, intrauterine device that is considered safe for MRI procedures, barrier [condom with spermicide]) and who do not plan to become pregnant, breastfeed, or donate ova during the course of the study and for 28 days after the final administration of investigational product.