Funding for this research was provided by:
Folktandvården, Örebro Läns Landsting (Not given)
Text and Data Mining valid from 2020-02-27
Received: 27 August 2019
Accepted: 30 January 2020
First Online: 27 February 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee in the Örebro region, Sweden (No: 298/03) and informed consent was obtained from all participants. In cases of children, parental consent was also obtained. As an incentive for participation in the study, all control subjects were offered cinema tickets (children) and/or a routine recall free of charge (adults).
: Not applicable.
: The authors report no conflicts of interests in relation to this paper.