Funding for this research was provided by:
TrygFonden (file no. 7-11-0500)
Sundhed, Region Midtjylland (1-15-1-72-13-09)
Received: 23 November 2018
Accepted: 21 August 2019
First Online: 28 August 2019
Ethics approval and consent to participate
: The study was conducted in compliance with the Declaration of Helsinki and in conformity with the laws and regulations in Denmark. The study is registered as part of the research projects covered by the joint university notification to the Danish Data Protection Agency on the processing of personal data conducted at Aarhus University (file no: 2015-57-0002, file no. of Aarhus University: 62908, serial no: 186). The Committee on Health Research Ethics in the Central Denmark Region found that no approval was needed as the study is based on routine data from Danish national registers (reference number: 1–10–72-215–15). Prior to the health check, all participants signed a written consent allowing collected data to be used for research purposes.
: The authors confirm, that the individuals in the supplementary files gave consent for their images to be published in this study.
: The authors declare that they have no competing interests.