Funding for this research was provided by:
Stockholms Läns Landsting (N/A)
Karolinska Institutet (N/A)
Received: 17 December 2019
Accepted: 19 June 2020
First Online: 23 June 2020
Ethics approval and consent to participate
: The study was approved by the Regional Ethical Review Board in Stockholm (registration number 2010/1185–31/5). The study has been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. This was an observational registry-based study using anonymized data. Informed consent was not applicable since the patients could not be identified.
: Not applicable.
: The authors declare that they have no competing interests.