Funding for this research was provided by:
Stiftelsen Olle Engkvist Byggmästare (183–435)
Västerbotten Läns Landsting
Received: 8 June 2020
Accepted: 13 August 2020
First Online: 26 August 2020
Ethics approval and consent to participate
: The working procedure and study design were examined by the Regional Ethical Review Board in Umeå, Sweden, and they had no ethical objections to the study (registration number 2017/11–31). Data were collected after death of the patients.
: Data are only reported in aggregate and cannot be attributed to individuals.
: The authors report no competing interests.