Get file.derived_from @id instead of accession
Get file.derived_from @id instead of accession

Files no longer embed derived from, so we can’t get the accession. The unembedded @id is just as good though. Redmine #4780

T2DREAM/t2dream-portal,ENCODE-DCC/encoded,T2DREAM/t2dream-portal,ENCODE-DCC/encoded,ENCODE-DCC/encoded,ENCODE-DCC/encoded,T2DREAM/t2dream-portal,T2DREAM/t2dream-portal