“…The sample sizes of the studies varied between 1,902 and 1,566,662. Of these meta-analyses, 20 studies [12][13][14]18,21,22,36,37,40,42,[44][45][46][47][48]53,54,57,59,60] reported risk for total cancer and various cancer types, three studies [49,50,52] reported mortality, and 12 studies [19,20,23,24,38,39,41,43,51,55,56,58] reported both mortality and risk. In eight meta-analyses [18,19,20,39,41,56,58,60], the primary studies consisted of RCTs.…”