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Article History

Received: 16 March 2021

Accepted: 19 July 2021

First Online: 18 August 2021

Declarations

:

: Saliva was collected from volunteers, who gave their written informed consent, in compliance with the regulations of the human subject review committee at The Faculty of Odontology, Malmö University, Sweden (Registration number OD-2013/111).

: Not applicable.

: The authors declare that they have no competing interests.