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I am not familiar with the Bland-Altman method, so was unclear when I read the methods section whether the text in lines 204-207 was explaining the Bland-Altman method or describing a separate procedure. I take from the results that those sentences were describing the Bland-Altman procedure, and if so, adding some text along the lines of "In this procedure..." would be helpful. As it was, I couldn't understand the description provided, and it didn't seem to match the figures, which were simply labeled as FM, so seemed to be a simple plots of FM using 2 methods on first read.