c1 Refereed Journal Article. ID23401 duplicate deleted MA 21/7/14. Record completed MA 21/7/14. Green in Sherpa: Author's Pre-print:   author can archive pre-print (ie pre-refereeing) 
Author's Post-print:   author can archive post-print (ie final draft post-refereeing) 
Publisher's Version/PDF:   author cannot archive publisher's version/PDF 
Requested (Peng) accepted v. & permission, 1.8.14-MMM. Received file (accepted) now waiting for Permission, 11.8.14-MMM. Received 12.8.14-MMM. Supporting documentation added to dark upload - HD 4/6/18