Funding for this research was provided by:
National Multiple Sclerosis Society (FG-1507-05262)
National Cancer Institute (R01CA154683)
National Institute of Neurological Disorders and Stroke (R01 052738-10, R01 NS052738-10, R37 NS042925-14)
Received: 1 March 2017
Accepted: 1 June 2018
First Online: 19 July 2018
: The authors declare no competing interests.