MA 14/6/17. --
Yellow in Sherpa: Author's Pre-print: 	green tick  author can archive pre-print (ie pre-refereeing)
Author's Post-print: 	grey tick  subject to Restrictions below, author can archive post-print (ie final draft post-refereeing)
Restrictions: 6 months embargo
Publisher's Version/PDF: 	cross  author cannot archive publisher's version/PDF
General Conditions: Publisher's version/PDF cannot be used
    On author's personal website, pre-print server, institutional website, institutional repository or subject-based open access repository
    Must link to publisher version
    Published source must be acknowledged with citation. --
6 MONTHS EMBARGO for accepted v. ENDS June 2017, INFO FROM journal article: This is an Open Access article distributed under the terms of the Creative
Commons Attribution Licence (CC BY-NC-ND 4.0), which permits copying
and redistribution for non-commercial purposes with no derivatives, provided
the original work is properly cited (http://creativecommons.org/licenses/bync-
nd/4.0/). Full-text added 22.6.17-MMM