<qa>  What is the name of the barrier method used for the duration of the study?8. If female and of childbearing potential, the subject must have a negative pregnancy test at the screening visit i.e., subject is not pregnant; not be lactating; and use an acceptable method of contraception, including abstinence, a barrier method diaphragm or condom, Depo-Provera, or hormonal contraceptive oral, implant, ring, patch for the duration of the study. NOTE: The subject must have used the chosen method of birth control for at least 1 monthcycle prior to enrollment into the study. 