Funding for this research was provided by:
Received: 30 May 2018
Accepted: 22 May 2020
First Online: 2 June 2020
Ethics approval and consent to participate
: The Medisch Ethische Toetsingscommissie (METC) Twente, The Netherlands, has given its ethics approval (reference number: P12–14, NL39774.044.12). Every participant signed a written consent form to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.