van den Brom, Rob R. H.
van der Geest, Kornelis S. M.
Brouwer, Elisabeth
Hospers, Geke A. P.
Boots, Annemieke M. H.
Article History
Received: 18 July 2017
Accepted: 7 March 2018
First Online: 15 March 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The clinical trial registry identifier is NTR4539. The study was approved by the medical ethical committee of the University Medical Center Groningen (approval numbers 2011.388 and 2012.375). All procedures performed in this study were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Written informed consent was obtained from all individual participants included in the study.