Berg, Lisa
Rostila, Mikael
Arat, Arzu
Hjern, Anders
Article History
Received: 23 January 2019
Accepted: 17 June 2019
First Online: 9 July 2019
Competing interests
: The authors declare no competing interests.
: Ethical approval for this study was obtained from the Regional Ethics Committee in Stockholm, Sweden (decision no 2014/415-31/5). Personal identification numbers are replaced by random reference numbers before data are made available for research and the researchers did not have access to any personal information that could identify individuals included in study population. Thus, since all data are anonymous, this register-based research does not involve contact with study participants and informed consent is not applicable.