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Acknowledgements
H. Matthes is a member of the guideline committee for integrative oncology. F. Schad received research grants from Abnoba, Helixor and Hiscia and R. Huber has been working in a scientific advisory board for Abnoba and received research grants from Abnoba, Helixor and Hiscia.
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The authors R.-D. Hofheinz, G. Bar-Sela, D. Galun, D. Martin, J. Langhorst and P.F. Matthiessen declare that they have no conflict of interest.
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Matthes, H., Hofheinz, RD., Bar-Sela, G. et al. Letter to the editors of the Journal of Cancer Research and Clinical Oncology. J Cancer Res Clin Oncol 145, 2405–2407 (2019). https://doi.org/10.1007/s00432-019-02926-y
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DOI: https://doi.org/10.1007/s00432-019-02926-y