fix to remove duplicate transcripts as they appear in refseq GRCh37 cache
fix to remove duplicate transcripts as they appear in refseq GRCh37 cache

willmclaren/ensembl-variation,willmclaren/ensembl-variation,willmclaren/ensembl-variation,Ensembl/ensembl-variation,Ensembl/ensembl-variation,willmclaren/ensembl-variation,Ensembl/ensembl-variation,willmclaren/ensembl-variation,Ensembl/ensembl-variation,Ensembl/ensembl-variation