Task: Answer Verification
Input (English): Question: Do thioguanine-nucleotides predict efficacy of tioguanine in Crohn 's disease?
Answer: 6-Thioguanine-nucleotide as well as methylated 6-thioguanine-nucleotide levels under tioguanine therapy were not related to efficacy. This suggests that monitoring of 6-thioguanine-nucleotide levels is not a useful tool to predict response to thiopurines.
Output (English): no