Funding for this research was provided by:
Karolinska Institute
Article History
Received: 23 July 2021
Accepted: 12 November 2021
First Online: 29 November 2021
Declarations
:
: The authors of this manuscript have no conflict of interest to disclose.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. Management and analysis based on the VAL database is part of a continuous quality control of healthcare utilization in Region Stockholm, and ethical approval has been obtained from the regional ethical review board in Stockholm to study comorbidities with these data.
: Informed consent was not applicable, as the study was based on pseudonymized, secondary data from registers. Research data are not shared.