Funding for this research was provided by:
Stichting Innovatie Alliantie (2014-046PRO)
Received: 9 October 2018
Accepted: 4 July 2019
First Online: 26 July 2019
Ethics approval and consent to participate
: All participants gave written informed consent prior to participation. The study was approved by the Medical Ethical Review Board of the Leiden University Medical Center [P15.281].
: Not applicable.
: The authors declare that they have no competing interests.