Received: 12 May 2020
Accepted: 26 August 2020
First Online: 24 September 2020
Ethics approval and consent to participate
: This study was in accordance with the Medical Ethical Committee guidelines of The University Medical Centre Groningen (approval M 14157).
: Written consent to publish was obtained from all participants.
: Ahmed Yousif, Gerry M. Raghoebar, Thomas F. Putters, Arjan Vissink and Jurjen Schortinghuis declare that they have no competing interests.