Background: The German Cancer Aid set up a priority research programme with the intention to generate high-quality information based on evidence and to make this information easily accessible for health-care professionals and advisors, researchers, patients, and the general public. Summary: The Kompetenznetz Komplementärmedizin in der Onkologie (KOKON) received 2 funding periods within this programme. During the first funding period, KOKON assessed patients’ and health-care professionals’ informational needs, developed a consulting manual for physicians, developed an education programme for self-help groups, set up a knowledge database, and developed a pilot information website for patients. Funding period 2 continues with work that allows cancer patients and health-care professionals to make informed decisions about complementary and alternative medicine (CAM). For this aim, KOKON evaluates training programmes for physicians (oncology physicians, paediatric oncologists, and general practitioners) and for self-help groups. All training programmes integrate results from an analysis of the ethical, psychological, and medical challenges of CAM in the medical encounter, and the knowledge database is being extended with issues related to CAM for supportive and palliative care. Key Message: A Germany-wide collaborative research project to identify needs, provide information, foster communication, and support decision-making about CAM in oncology is being set up.

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