Received: 10 November 2020
Accepted: 25 January 2021
First Online: 19 February 2021
Ethics approval and consent to participate
: The research protocol was approved by the Medical Ethics Committee of the UMCG (METc 2015.517).
: Informed consent was signed by all the participants prior to treatment.
: Caroliene M. Meijndert, Gerry M. Raghoebar, Arjan Vissink and Henny J.A. Meijer declare that they have no competing interests.