Received: 2 March 2020
Accepted: 7 May 2020
First Online: 14 May 2020
Ethics approval and consent to participate
: The study complied with the principles set forth in the Declaration of Helsinki. Access to the de-identified linked dataset was obtained from the TCGA and GEO databases in accordance with the database policy. For analyses of de-identified data from the TCGA and GEO databases, institutional review board approval and informed consent were not required.
: Not applicable.
: The authors declare that they have no competing interests.