Quaak, C. H.
Cové, E.
Driessen, G. J.
Tramper-Stranders, G. A. http://orcid.org/0000-0002-0228-5375
Funding for this research was provided by:
University Medical Center Rotterdam
Article History
Received: 9 February 2018
Revised: 18 May 2018
Accepted: 29 May 2018
First Online: 8 June 2018
Compliance with ethical standards
: The local ethical review board reviewed protocol and deemed formal ethical approval of the study unnecessary because of the absence of risk for patients. They however approved the study.
: The authors declare that they have no conflicts of interest.