Received: 14 April 2020
Accepted: 7 January 2021
First Online: 20 January 2021
Ethics approval and consent to participate
: The study was approved of by the Medical Research Ethics Committee (METC) of the Academic Hospital Maastricht/Maastricht University (METC 17–4-026). The research was conducted in accordance with the 1964 Declaration of Helsinki and its later amendments [CitationRef removed].
: Not applicable.
: The authors declare that they have no competing interests.