van Bussel, E. M.
Houwert, R. M.
Kootstra, T. J. M.
van Heijl, M.
Van der Velde, D.
Wittich, Ph.
Keizer, J.
Article History
Received: 30 December 2016
Accepted: 12 September 2017
First Online: 14 September 2017
Compliance with ethical standards
:
: This research did not involve any animal participation. The local ethical committee wrote a declaration which stated that the patients involved in this study could be contacted for the used questionnaires and that no further ethical approval was mandatory. This declaration is in possession of the first author.
: All involved patients gave their informed consent for usage of the anonymized results of these questionnaires.
: E. M. van Bussel, R. M. Houwert, T. J. M. Kootstra, M. van Heijl, D. Van der Velde, Ph. Wittich, and J. Keizer declare that they have no conflict of interest.