Funding for this research was provided by:
Hrvatska Zaklada za Znanost (DOK-09-2018, IMUNODENT IP-7500-09-2014)
Received: 16 March 2020
Accepted: 6 May 2020
First Online: 1 July 2020
Ethics approval and consent to participate
: The study was performed according to Declaration of Helsinki 1964 and its later amendments. All participants signed written informed consent and Institution’s Ethics Committee approved the study (No. 003-05/15-1119 and 003-08/15-01/24).
: Not applicable.
: The authors declare that they have no competing interests.