7. Female participants consents to use a medically acceptable method of birth control throughout the entire study period and for four weeks after the study is completed. Medically acceptable methods of contraception that may be used by the study participants and/or their partner includes abstinence, birth control pills or patches, diaphragm with spermicide, IUD, condom and vaginal spermicide, surgical sterilization, vasectomy, progestin implants or injections.