Beelen, A. M. E. H.
Vonk, P. E.
de Vries, N.
Article History
Received: 2 August 2018
Revised: 25 September 2018
Accepted: 1 October 2018
First Online: 18 October 2018
Compliance with ethical standards
:
: N. de Vries is researcher for Inspire and JAZZ pharmaceuticals and consultant to NightBalance, Philips, and Olympus. The authors A.M.E.H. Beelen and P.E. Vonk declare that they have no conflict of interest.
: All procedures performed in this study 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.
: For this type of study, formal consent is not required.