Article History
First Online: 8 March 2018
Compliance with Ethical Standards
:
: None of the authors have conflicting interests.
: Participants were fully aware of the purpose of this study and the reasons they were included as participants. Subjects were aware that their data will be used for scientific purposes, treated confidentially and that all answers will be anonymized. Subjects had the opportunity to contact the authors with any questions and remarks concerning the study.