Funding for this research was provided by:
Horizon 2020 (643309)
Received: 21 October 2017
Accepted: 1 February 2018
First Online: 16 February 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: 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 participants included in the study prior to accessing the survey.
: All data used to generate the results and conclusions of this manuscript are available on request from the corresponding author.