Disentangling Type 2 Diabetes and Metformin Treatment Signatures in the Human Gut Microbiota

Nature 528, 262–266 (2015); doi:10.1038/nature15766 In the Supplementary Information to this Letter, data from two previous studies were used in the meta-analysis. However, the unit conversions used to make the data comparable were inconsistent for two of the included phenotype measures. Although this error does not affect the data used to generate the conclusions of the Letter, it might affect follow-up studies using the glycated haemoglobin (HbA1c) and serum insulin phenotypes.