Funding for this research was provided by:
Horizon 2020 Framework Programme (643476)
Received: 27 March 2019
Accepted: 29 August 2019
First Online: 13 September 2019
Ethics approval and consent to participate
: Written informed consent was obtained from the patients and/or their legal guardians. The study protocol was approved by the local ethics committee (H-1-2010-009) and the Danish Data Protection Agency.
: Not applicable.
: The authors declare that they have no competing interests.