Koppert, Tim Y. http://orcid.org/0000-0002-3194-6670
van Middendorp, Henriƫt http://orcid.org/0000-0003-4575-0895
Geenen, Rinie http://orcid.org/0000-0002-6615-6708
Article History
Received: 24 February 2022
Accepted: 25 March 2022
First Online: 12 April 2022
Declarations
:
: No conflicts of interest.
: The online questionnaire studies in 2018 (FETC17-120, December 5, 2017) and 2020 (FETC20-190, March 23, 2020) were approved by the Ethics Committee at Utrecht University and the study in 2021 (2021-02-16-Henriet van Middendorp-V2-2959, February 16, 2021) at Leiden University, the Netherlands. The study has been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Participants gave informed consent prior to inclusion in the study.