 16. Females of child bearing potential that are sexually active must agree to either practice 2 medically accepted highly effective methods of contraception at the same time or abstain from heterosexual intercourse from the time of signing the informed consent through 120 days after the last dose of study drug. See Appendix H for protocol-approved highly effective methods of contraceptive combinations. Subjects of childbearing potential are those who have not been surgically sterilized or have not been free from menses for 1 year. 