Funding for this research was provided by:
Novo Nordisk Fonden (NNF13OC0003234 andNNF15OC0016474)
Fonden til Lægevidenskabens Fremme
Familien Hede Nielsens Fond
Received: 5 July 2018
Accepted: 11 December 2018
First Online: 14 January 2019
Ethics approval and consent to participate
: The study was approved by the Danish Data Protection Agency (journal number: 2013-41-2017). According to Danish law no approval was obtained by the National Committee on Health Research Ethics since the study solely includes registry data.
: The manuscript contains no individual person’s data in any form.
: The authors declare that they have no competing interests.
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