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[Correspondence] Type 2 diabetes

We read with great interest the Seminar (Feb 9, 2017, p 2239)1 on type 2 diabetes by Sudesna Chatterjee and colleagues. However, we were surprised by the articles selected and believe that detailed selection criteria with the level of evidence of reported studies would have been useful to the reader. According to the research method described, we would expect other papers to be cited, including meta-analyses of randomised controlled trials that could have balanced the authors’ outlook.2–6 For example, intensive glycaemic control probably has some beneficial effect on diabetic complications, such as non-fatal myocardial infarctions3–5 or retinopathy assessed with the Early Treatment Diabetic Retinopathy Study scale.