Funding for this research was provided by:
Svenska Forskningsrådet Formas (DNR 942-2015-1015)
Received: 23 April 2020
Accepted: 21 August 2020
First Online: 4 September 2020
Ethics approval and consent to participate
: The samples had already been used for analyses in previous studies, and therefore, no ethical approval was needed.
: Not applicable.
: The authors declare that they have no competing interests.