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The article cited above outlines the details of the then-upcoming Glycemia Reduction Approaches in Diabetes: A Comparative Effectiveness Study (GRADE) clinical trial, but it was not linked to the GRADE ClinicalTrials.gov identifier. The GRADE ClinicalTrials.gov identifier is NCT01794143.
The online version of the article (https://doi.org/10.2337/dc13-0356) has been updated with the ClinicalTrials.gov identifier.
