Funding for this research was provided by:
Work Environment Research Fund, Denmark (01-2015-09)
Received: 13 February 2020
Accepted: 22 June 2020
First Online: 20 July 2020
Ethics approval and consent to participate
: The PODESA study has been approved by the Danish Data Protection Agency (file number 2013-10-11/104); this approval includes the use of register data. The DPhacto cohort was approved by the Danish Data Protection Agency and the local Ethics Committee (file number H-2-2012-011) [CitationRef removed]. The NOMAD cohort was approved by the Ethics Committee for the Capital Region of Denmark (file number H-2-2011-047) [CitationRef removed]. All participants in the NOMAD and DPhacto studies received written and oral information about the projects, the practicalities of participating, potential risks of participating and having the possibility of withdrawal from the project without giving a specific reason. The persons agreeing to participate gave a written consent to participate in the study and the use of the data for research studies.
: The authors declare no conflicts of interest.