White in Sherpa, Author's Pre-print: 	question mark  archiving status unclear
Author's Post-print: 	grey tick  subject to Restrictions below, author can archive post-print (ie final draft post-refereeing)
Restrictions: 	

    12 months embargo

Publisher's Version/PDF: 	cross  author cannot archive publisher's version/PDF
General Conditions: 	

    On institutional repository
    NIH Authors can deposit in PubMed Central for public release after 12 month embargo
    Publisher's version/PDF cannot be used
    Published source must be acknowledged with citation
    Must link to publisher version, accepted v requested   ( Apostolopoulos) 12 MTH EMBARGO TILL  DEC 31ST 2018, LL 17/12/18. V.A. sent 1994 original paper, does not have 2017 publication. LL 5/2/19