4. Male patients, even if surgically sterilized (ie, status post-vasectomy), must agree to one of the following: • Agree to practice effective barrier contraception during the entire study treatment period and through 90 days after the last dose of study drug, OR • Must also adhere to the guidelines of any treatment-specific pregnancy prevention program, if applicable, OR • Agree to practice true abstinence when this is in line with the preferred and usual lifestyle of the subject. (Periodic abstinence (eg, calendar, ovulation, symptothermal, post-ovulation methods] and withdrawal are not acceptable methods of contraception.)