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Article History

Received: 12 November 2018

Accepted: 22 February 2019

First Online: 4 March 2019

Ethics approval and consent to participate

: The PODESA study has been tacitly 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) []. The NOMAD cohort was approved by the Ethics Committee for the Capital Region of Denmark (file number H-2-2011-047) []. 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 with sufficient time for considerations of their participation. The persons agreeing to participate gave a written consent to participate in the study and the use of the data for research studies. PODESA is a merge of the similar NOMAD and Dphacto datasets for common analyses on the original research purposes of NOMAD and DPhacto, which has been tacitly approved by the Danish Data Protection Agency without the need of further specific consent by the participants (file number 2013-10-11/104).

: Not applicable.

: The authors declare that they have no competing interests.

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