Acknowledgements
The authors gratefully acknowledge the valuable inputs from Prof. D.E. Speiser of the Clinical Tumour Biology and Immunotherapy Group, Department of Oncology and Ludwig Cancer Research Centre, University of Lausanne, Switzerland.
Declaration of interest
This study was supported by a partial grant from the Research Council, Kantonsspital Aarau (Forschungsrat KSA). The work of Udo Gaipl was supported by the German Research Foundation (DFG-Graduiertenkolleg 1660: Key signals of the adaptive immune response) and the German Federal Ministry of Education and Research (BMBF, m4 Cluster, 16EX1021R). The authors alone are responsible for the content and writing of the paper.