<qa>  What is the questionnaire developed to assess the quality of life of cancer patients?The intervention is evaluated using questionnaires. All participants receive a questionnaire at baseline and after 6 and 12 weeks. The questionnaire consists of EORTC-QLQ-C30 a validated questionnaire developed to assess the quality of life of cancer patients and HADS the validated Hospital Anxiety and Depression Scale. At baseline the questionnaire is extended with the question: Which of the following problems symptoms do you need help with the most?. The patients can choose between 12 defined problems matching 12 of the scales of EORTC-QLQ-C30 or none of the above. The answer given by the patient is labeled The Primary Problem. 