<qa>  What was the name of the method used for the duration of the study?- Subjects with reproductive potential could be entered into the study if they had been using and were willing to continue to use two methods of contraception for the duration of the study. These methods included male condom for men in addition to an oral contraceptive, contraceptive implant or injection, intrauterine device, diaphragm, or a contraceptive sponge for women. Adequate protection, as defined above, had to have been used for at least 1 month prior to screening for all, with the exception of oral contraceptives, which should have been used for at least 3 months prior to screening. These methods had to be continually used for 30 days after the end of the study. Subjects that had been surgically sterilized tubal ligation, hysterectomy, or vasectomy or had been post-menopausal for at least 2 years by history were not considered to be of reproductive potential. 