Received: 11 October 2019
Accepted: 21 January 2020
First Online: 3 February 2020
Ethics approval and consent to participate
: Written approval to conduct this study was received from the medical ethical research committee from the Erasmus MC University Medical Center (Erasmus MC), Rotterdam, the Netherlands (MEC-2015-306).
: Not applicable.
: The authors declare that they have no competing interests.