Funding for this research was provided by:
Oesterreichische Nationalbank (AP 12200 ÖNB)
Text and Data Mining valid from 2018-05-23
Received: 26 December 2017
Accepted: 9 May 2018
First Online: 23 May 2018
Compliance with ethical standards
: The authors have no financial interests associated with the funding sponsor for this research, and thus, the authors declare that no conflict of interest exists with respect to this work.
: Ethical approval was granted in Austria by the Austrian Ethics Commission, the Department of Justice, and the Medical University of Vienna and in Finland by the Ministry of Social Affairs and Health, the Ministry of the Interior, the Office of the Data Protection Ombudsman, the Ethics Committee for Pediatrics, and the Adolescent Medicine and Psychiatry of Helsinki University Central Hospital. The Austrian Project was funded by the Austrian National Bank (Jubiläumsfonds AP 12200 OENB).