Funding for this research was provided by:
Stockholms Läns Landsting (20170145)
Text and Data Mining valid from 2020-01-29
Received: 26 March 2019
Accepted: 14 January 2020
First Online: 29 January 2020
Ethics approval and consent to participate
: The study was approved by the Regional Ethics Committee in Stockholm, Sweden (registration number 2017/447–31/1). All data were handled confidentially, and the results are presented in a non-identifiable way at a group level in the present study. Consent from the patients was not required due to the retrospective nature of the study. Permissions from the databases were required to access the data in the study and permissions were acquired after the study was approved by the Regional Ethics Committee in Stockholm.
: Not applicable.
: The authors declare that they have no competing interests.