Women who are able to have children will have a blood (about 1 tablespoon) pregnancy test 28 days after the last dose of study drug. If your periods are irregular you will have 2 blood (about 1 tablespoon each time) pregnancy tests, one 14 days after the last dose of study drug and another 28 days after the last dose of study drug. Response of disease to therapy will be assessed at follow-up 28 days after last dose of study drug.