- Serum total bilirubin <1.5 x institutional upper limits of normal (ULN) 8. Woman of childbearing potential [defined as a sexually mature woman who has not undergone hysterectomy or who has not been naturally postmenopausal for at least 24 consecutive months (i.e. who has had menses any time in the preceding 24 consecutive months) with a negative serum pregnancy test. In addition, all sexually active woman of childbearing potential and men agreeing to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry, during the duration of study participation and for at least 4 weeks after withdrawal from the study, unless they are surgically sterilised 9. Ability to understand and the willingness to sign a written informed consent document