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To the Editor: The study by Adams et al. (Sept. 21 issue)1 provides further evidence regarding the durable effects of bariatric surgery on both weight loss and type 2 diabetes. It also supports data from randomized, controlled trials indicating that bariatric surgery is the most effective current therapy for the management of both conditions. However, we note that the authors chose to define diabetes outcomes using criteria that differ from those used in other recent similar studies. Indeed, a number of differing diabetes outcome definitions have been used in the published literature, which raises concern regarding the comparability of these . . .