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Journal Article
Koenig, Jochem, van Ewijk, Reyn, Kuhr, Kathrin, Schmidberger, Heinz, Woeckel, Achim, Kreienberg, Rolf and Blettner, Maria (2016). Radiotherapy effects on early breast cancer survival in observational and randomized studies: a systematic analysis of advantages, disadvantages and differences between the two study types. Breast Cancer, 23 (3). S. 415 - 425. TOKYO: SPRINGER JAPAN KK. ISSN 1880-4233