tokens: Because all PDGFbetaR fusions described thus far result in splicing to a common exon of this gene , we performed 5 ' - rapid amplification of cDNA ends PCR on patient RNA .
folded_tokens: because all pdgfbetar fusion describe thus far result in splicing to a common exon of this gene , we perform 5 ' - rapid amplification of cdna end pcr on patient rna .