LL 20/9/17. --
Blue in Sherpa: Author's Pre-print: 	question mark  archiving status unclear
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
    Creative Commons Attribution Non-Commercial No Derivatives License
    Published source must be acknowledged
    Must link to publisher version with DOI
    Publisher's version/PDF may be used
    Publisher automatically deposits in PubMed Central on behalf of authors. --
Full-text added 26.9.17-MMM