However, combined analysis of polymorphisms in the TS-5′ UTR showed a trend for superior survival in patients harbouring a favourable TS-5′ UTR genotype.
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Polymorphisms of glutathione S-transferases (GST) and thymidylate synthase (TS)--novel predictors for response and survival in gastric cancer patients.
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The sentences
The reason that the observed effect did not reach statistical significance may be again due to the small number of patients.