Received: 28 October 2017
Accepted: 18 January 2018
First Online: 27 January 2018
Ethics approval and consent to participate
: The authors assert that all procedures contributing to this work comply with the ethical standards of the relevant national and institutional committees on human experimentation and with the Helsinki Declaration of 1975, as revised in 2008. The project received prior approval (1978) from the Ethical Committee of the Zurich University Psychiatric Hospital, University of Zurich, Zurich, Switzerland. Informed consent was obtained from all participants.
: Written informed consent to publish results of the assessed data at congresses and in peer-reviewed journals was obtained from all participants.
: The authors declare that they have no competing interests.
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