The CML Advocates Network is an active network specifically for leaders of Chronic Myeloid Leukemia (CML) patient groups, connecting 128 patient organisations in 93 countries on all continents. It was set-up and is run by CML patients and carers. Its aim is to facilitate and support best practice sharing among patient advocates across the world. It is run independently by CML patients and hosted by the patient-run Leukemia Patient Advocates Foundation. The website has turned out to be a very powerful tool to support patient leaders around the world, to provide a knowledge base on CML advocacy, and to facilitate best practice sharing.