van Balen, Romke http://orcid.org/0000-0001-8314-9553
Gordon, Adam L.
Schols, Jos M. G. A.
Drewes, Yvonne M.
Achterberg, Wilco P.
Article History
Received: 18 July 2019
Accepted: 17 September 2019
First Online: 8 October 2019
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: Approval from a medical ethics committee was not necessary, because under Dutch law, these kinds of surveys are exempt from ethical approval.