“…Of the remaining 20 articles, 6 were excluded with different reasons, which included unable to obtain the related data distribution in cases and controls, data not qualified (controls having ED). Finally, the remaining 14 studies (Akbas et al, ; Aldemir et al, ; Aldemir et al, ; Bayraktar & Albayrak, ; Ciftci et al, ; Ciftci et al, ; El Taieb, Hegazy, Maklad, & Khairy, ; Guo et al, ; Guo et al, ; La Vignera et al, ; Otunctemur et al, ; Sambel et al, ; Senturk et al, ; Wang et al, ) were enrolled in our systematic review and meta‐analysis, all of which were identified as case–control studies. No further articles were identified for inclusion through the repeated cited reference screening.…”