STUDY POPULATION AND DESIGN The study population comprises 150 patients with haematological malignancies who are not in current chemotherapy. The patients will be included from seven haematological out-patient clinics in Denmark. The haematological out-patient clinics have a large group of chronic severely fatigued haematological cancer patients that will be approached for inclusion in the trial. Power calculations, and assumptions behind as well as a detailed list of inclusion and exclusion criteria are available from full study protocol.