Received: 9 March 2020
Accepted: 24 April 2020
First Online: 26 June 2020
Ethics approval and consent to participate
: The study was approved by the UMCG Medical Ethical Committee (METc 2017/551). The principles in the Declaration of Helsinki were followed.
: Not applicable
: Pieter Onclin, Joep Kraeima, Bram BJ Merema, Henny J Meijer, Arjan Vissink, and Gerry M Raghoebar declare that they have no competing interests.