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Article History

Received: 6 April 2020

Revised: 30 August 2020

Accepted: 16 September 2020

First Online: 7 October 2020

Ethics approval and consent to participate

: As this study was based on anonymous information from the Swedish national registries and study participants were never contacted, it was approved by the Ethics Committee of Lund University without requirement for informed consent. Through advertisements in the major newspapers, people could chose to opt out before the research database were constructed. The study was performed in accordance with the Declaration of Helsinki.

: Not applicable.

: The use of these data is governed by an agreement with the Swedish National Board of Health and Welfare with J.S., which does not allow redistribution of original data. Anyone who is interested in the data set should contact the Swedish National Board of Health and Welfare and apply for the access to the data set (ExternalRef removed). If anyone gets the approval, they can get access to the database in the same manner as the authors. The project database is located at Center for Primary Health Care in Malmö, Sweden.

: The authors declare no competing interests.

: Not applicable.