“…The population characteristics varied across each study cohort, and a summary is provided in Table 1 . Of the 22 articles included in the systematic review, two articles included only individuals with T1DM [ 45 , 46 ], 10 articles included only individuals with T2DM [ 17 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ], three articles included both T1DM and T2DM [ 56 , 57 , 58 ], and seven articles did not specify [ 59 , 60 , 61 , 62 , 63 , 64 , 65 ]. Most studies included middle-to-older age subjects with a long duration (~15 years) of diabetes.…”