Funding for this research was provided by:
Text and Data Mining valid from 2019-01-31
Received: 15 November 2018
Accepted: 5 January 2019
First Online: 31 January 2019
Conflict of interest
: B Sutter, M. Fehr, C. Hartmann, S. Schmid, M. Zitzmann and P. Stute declare to have no conflict of interest in context of this manuscript.
: Due to the sensitive nature of the questions asked in this study, survey respondents were assured raw data would remain confidential and would not be shared.