Thorsén, Frida
Antonson, Carl
Palmér, Karolina
Berg, Rada
Sundquist, Jan
Sundquist, Kristina
Funding for this research was provided by:
Lund University
Article History
Received: 4 July 2022
Accepted: 1 September 2022
First Online: 19 September 2022
Declarations
:
: Permission was acquired from the local ethics committees (<i>Etikprövningsnämnden</i>) in Lund, Sweden (reference no. 2014/429). The necessary authorization and ethical permission for the Bulgarian part of the study was acquired from the Bulgarian Academy of Science.All participants agreed to participate and gave written consent to publication. Consent from parents was not legally needed according to the local ethics committee as the participants in the study was aged 15 and above.
: Not applicable.
: The authors declare that they have no competing interests.