Lyhs, Ulrike
Frandsen, Henrik
Andersen, Birgitte
Nonnemann, Bettina
Hjulsager, Charlotte
Pedersen, Karl
ChriƩl, Mariann
Article History
Received: 30 January 2019
Accepted: 30 October 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.