Funding for this research was provided by:
The Danish Work Environment Research Fund
Fundação de Amparo à Pesquisa do Estado de São Paulo (grant#2015/18310-1)
Received: 7 March 2018
Accepted: 22 October 2018
First Online: 20 November 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee for the Capital Region of Denmark (journal number H-2-2012-011) and conducted in accordance with the Helsinki declaration. Written informed consent was obtained from all participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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