Funding for this research was provided by:
Deutsches Krebsforschungszentrum (DKFZ)
Received: 26 November 2021
Accepted: 24 December 2021
First Online: 10 January 2022
: Tissue sample collection and processing as well as data collection and use were performed in accordance with local ethics regulations and approvals as well as the 1964 Helsinki declaration and its later amendments. All procedures were performed in accordance with local institutional review board guidelines.
: D.C., A.V.D., D.J. have a patent pending: DNA methylation-based method for classifying tumor species (EP16710700.2). The other authors declare that they have no conflict of interest.