a. Practice true abstinence (which must be reviewed on a monthly basis and source documented) or agree to use a barrier method of birth control (condoms not made out of natural [animal] membrane [latex condoms are recommended]) during sexual contact with a pregnant female or FCBP while participating in the study, during dose interruptions, and for at least 28 days after the last dose of IP, even if he has undergone a successful vasectomy.