c1 Refereed 
Blue in Sherpa - Author's Pre-print:   author cannot archive pre-print (ie pre-refereeing) 
Author's Post-print:   author cannot archive post-print (ie final draft post-refereeing) 
Publisher's Version/PDF:   author can archive publisher's version/PDF 
 TPP 20/3/2014.  Dup ID 23705 deleted Lyn 17/3/14. Requested (Nagendra) permission, 31.7.14-MMM. Received 26.8.14-MMM. Supporting documentation added to dark upload - HD 1/6/18