Article History
Received: 29 April 2019
Accepted: 18 February 2020
First Online: 18 March 2020
Ethics approval and consent to participate
: The study was performed in accordance with the guidelines of the Declaration of Helsinki [CitationRef removed]. All participants gave informed consent to participate in the study. They participated voluntarily in the research, without coercion or reward. The research team invited the experts to participate in the research. Only experts that gave their written consent were included to fill out the secured digital Delphi questionnaire. Only fully completed Delphi surveys were included in the study. No clients or patients were involved in this study. As agreed with the experts, the data was analyzed anonymously while respecting confidentiality and privacy, and has not been shared with other parties. The online questionnaire does not concern medical scientific research and there is no infringement of the physical and/or psychological integrity of the subject. Therefore, no ethical approval from an Ethical Review Board was required as confirmed by the Dutch Central Committee for Research Involving Human Subjects (CCMO) [CitationRef removed]. No ethical review was required in any of the other countries where experts participated, see for instance the Australian National Health and Medical Research Council (NHMRC) [CitationRef removed], the British Health Research Authority (HRA) [CitationRef removed] and regulations of the other countries (see alsoExternalRef removed).
: Not applicable.
: The authors declare that they have no competing interests.