MA 23/5/17. --
Green in Sherpa: Author's Pre-print: 	green tick  author can archive pre-print (ie pre-refereeing)
Author's Post-print: 	green tick  author can archive post-print (ie final draft post-refereeing)
Publisher's Version/PDF: 	green tick  author can archive publisher's version/PDF
General Conditions: 	

    On open access repositories
    Authors retain copyright
    Creative Commons Attribution License
    Published source must be acknowledged
    Publisher's version/PDF may be used
    Set statement to accompany [This Document is Protected by copyright and was first published by Frontiers. All rights reserved. it is reproduced with permission.]
    Articles are placed in PubMed Central immediately on behalf of authors. --
Full-text added, 24.5.17-MMM