Article History
Received: 14 July 2020
Accepted: 22 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: Prior to commencement of the study, ethical clearance for the study was sought and obtained from the Research Committee of the University of Khartoum—Faculty of Dentistry (Reference: HREC assigned number 5/2015). Additionally, parents/guardians and children provided providing written informed consent and assent, respectively. Permission to carry out the research in the schools was obtained from Directors of Primary School Education for the relevant authorities and also the Director of each participating primary school.
: Not applicable.
: The authors declare there are no potential conflicts of interest in respect to the authorship or the publication of the present article.