Article History
Received: 27 July 2017
Accepted: 28 March 2018
First Online: 7 May 2018
Change Date: 25 June 2018
Change Type: Correction
Change Details: In the version of this article initially published, the annotation accompanying ref. 47 ended with “though the modulation of microglia.” The first word of this phrase should have been “through.” The error has been corrected in the HTML and PDF versions of the article.
Competing interests
: The authors declare no competing financial interests.