“…The Gwet's AC1 was equal to 0.86 (95% CI: 0.77−0.94, standard error [SE] = 0.04), indicating a very good level of agreement between the two reviewers that performed screening. Thirty records representing 21 different studies (Alawwad et al, 2020 ; Asgary et al, 2017 ; Awawdeh et al, 2018 ; Brizuela et al, 2017 ; Cengiz & Yilmaz, 2016 ; Chailertvanitkul et al, 2014 ; El‐Meligy & Avery, 2006 ; Eppa et al, 2018 ; Keswani et al, 2014 ; Kumar et al, 2016 ; Kundzina et al, 2017 ; Nosrat et al, 2013 ; Ozgur et al, 2017 ; Parinyaprom et al, 2018 ; Peskersoy et al, 2021 ; Qudeimat et al, 2007 ; Suhag et al, 2019 ; Taha & Khazali, 2017 ; Uesrichai et al, 2019 ; Vu et al, 2020 ; Wei et al, 2010 ) were further introduced for data extraction. The remaining 24 records were protocols of potentially eligible studies.…”