Funding for this research was provided by:
Federal Office of Justice in Switzerland
Text and Data Mining valid from 2019-05-17
Received: 12 February 2018
Accepted: 7 May 2019
First Online: 17 May 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The study design was reviewed by ethics committees in Basel, Lausanne (Switzerland), and Ulm (Germany), and all participants provided informed consent (for those younger than 18 years, consent from the parent or legal guardian was obtained as well).