Article History
Received: 12 April 2018
Accepted: 4 October 2018
First Online: 8 October 2018
Compliance with ethical standards
:
: The authors declare no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
: The study protocol was approved by the local ethics committee of St. Radboud University Nijmegen. No clinical trial registration number available.