de Rooy, F. B. B. http://orcid.org/0000-0002-2618-0594
Buhmann, C.
Schönwald, B.
Martinez-Martin, P.
Rodriguez-Blazquez, C.
Putter, H.
Elzevier, H. W.
van der Plas, A. A.
Article History
Received: 7 May 2019
Accepted: 24 July 2019
First Online: 8 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Both in Germany and Spain, no formal ethical approval was required, as the survey was addressed to professionals, not to patients, lacks personal data and research characteristics were non-invasive, non-harmful, and non-sensitive.