Hjalmarsson, Anna http://orcid.org/0000-0002-5758-7610
Holmberg, Mats
Asp, Margareta
Östlund, Gunnel
Nilsson, Kent W.
Kerstis, Birgitta
Article History
Received: 2 June 2020
Accepted: 16 November 2020
First Online: 2 December 2020
Ethics approval and consent to participate
: Ethical approval was obtained by the Swedish Ethical Review Authority (Dnr: 2019–02027), and access permission to anonymized registry data was provided by the manager of the EMS of the region.
: Not applicable.
: The authors declare that they have no competing interests.