SRL for [for codon 132 of the IDH1 gene and codon 172 of the IDH2 gene]: Mutation analyses were performed using polymerase chain reaction -LRB- PCR -RRB- and pyrosequencing [for codon 132 of the IDH1 gene and codon 172 of the IDH2 gene] on DNA extracted from parraffin - embedded tissue .
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