Text and Data Mining valid from 2019-04-15
Received: 2 January 2019
Accepted: 15 March 2019
First Online: 15 April 2019
Compliance with ethical guidelines
: N. Kalak, M. Gerber, D.S. Bahmani, R. Kirov, U. Pühse, E. Holsboer-Trachsler and S. Brand declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.