Do I have to take part? What if I change my mind?

Your involvement is entirely voluntary (your choice). You can decide not to take part or you can agree to take part and then change your mind at any time, for any reason. If you start a study and then change your mind, you can withdraw from the study – but we would ask you to come to the clinic for a final visit so that we can check your health and make sure you are getting the right treatments for your condition.