Funding for this research was provided by:
National Cancer Institute (Intramural funding)
National Institutes of Health (Intramural funding)
Received: 11 May 2020
Accepted: 19 June 2020
First Online: 8 July 2020
: All patients provided informed consent under a Neuro-Oncology Branch natural history protocol (NCI 16-C-0151), which was approved by the Institutional Review Board of the National Cancer Institute.
: As above.
: All authors declare no competing interests.