“…Other reasons included non‐oral or unclear cancer diagnosis terminology ( N = 9) or the full text was unavailable or not retrievable ( N = 3). Fourteen studies were retained, and all were based on biopsy data (Abiose, Ogunniyi, & Oyejide, ; Adebayo, Ajike, & Adekeye, ; Al‐Khateeb, Al‐Hadi Hamasha, & Almasri, ; Aregbesola, Ugboko, Akinwande, Arole, & Fagade, ; Arotiba, ; de Arruda et al, ; Budhy, Soenarto, Yaacob, & Ngeow, ; Creath, Cutter, Bradley, & Wright, ; Effiom et al, ; Iatrou, Theologie‐Lygidakis, Tzerbos, & Schoinohoriti, ; Mohtasham, Saghravanian, Goli, & Kadeh, ; Piloni, Molina, & Keszler, ; Sato, Tanaka, Sato, & Amagasa, ; Trobs, Mader, Friedrich, & Bennek, ).Stratifying by WHO geographic regions, five studies were from the African region (Abiose et al, ; Adebayo et al, ; Aregbesola et al, ; Arotiba, ; Effiom et al, ), three from the Americas (de Arruda et al, ; Creath et al, ; Piloni et al, ), two each from the Eastern Mediterranean (Al‐Khateeb et al, ; Mohtasham et al, ) European (Iatrou et al, ; Trobs et al, ) and South‐East Asia/Western Pacific regions (Budhy et al, ; Sato et al, ).…”