Feenstra, Bjarke http://orcid.org/0000-0003-1478-649X
Gørtz, Sanne
Lund, Marie
Ranthe, Mattis F.
Geller, Frank
Melbye, Mads
Article History
Received: 2 November 2018
Revised: 1 March 2019
Accepted: 4 March 2019
First Online: 12 March 2019
Competing interests
: The authors declare no competing interests.
: The study was approved by the Danish Data Protection Agency. In Denmark, ethics committee approval is not required for register based studies.