To the Editor It is with great interest that we read the recent contribution from Ivanova et al, in which the authors found no association between body mass index z-score (BMIz) and the risk of malignant disease in pediatric thyroid nodules. The authors' findings contrast with our own study, in which we found BMIz to be a significant and independent predictor of pediatric thyroid cancer. We want to highlight a few differences between the studies, which may explain variance in the results.
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