<qa>  What is the preferred lifestyle of the subject?9. Males must agree to either use a latex condom during any sexual contact with FCBP or practice true abstinence when this is in line with the preferred and usual lifestyle of the subject. Periodic abstinence e.g. calendar, ovulation, symptothermal, post-ovulation methods and withdrawal are not acceptable methods of contraception while participating in the study and for 28 days following discontinuation from this study, even if he has undergone a successful vasectomy. . 