“…[17][18][19]23,26,27 Seven SRs restricted the language of publication to English, 2,7,22,24,25,27,28 one SR restricted articles to English and Spanish, 26 one SR restricted to English and Portugese, 18 and one SR restricted to English, Spanish and Portugese, 17 with the remaining seven placing no restrictions. 4,6,[19][20][21]23,29 The authors of 12 SRs declared no conflict of interest, and of the four SRs which did not declare, 18,20,25,27 two were theses. 18,27 One SR reported that the authors had received grants but did not specify if there was competing interest related to the SR. 17 Six SRs reported on funding, with one being funded by a dental association, 28 two from the authors' institutions, 7,29 and three were self-funded/ received no external funding.…”