Funding for this research was provided by:
University of Glasgow
Article History
Received: 7 March 2017
Accepted: 22 June 2017
First Online: 26 July 2017
<!--Emphasis Type='' removed-->Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Additional informed consent was obtained from all individual participants for whom identifying information is included in this article.