5. Agrees to use a highly effective method of contraception, i.e. condom and suitable contraception for his female partner e.g. oral contraceptive or intrauterine contraceptive device during heterosexual intercourse or be non-heterosexually active, or practice sexual abstinence throughout the study period and for 30 days following final dose of study drug, and must agree to refrain from sperm donation from Day -2 until at least 30 days following final dose of study drug.