Funding for this research was provided by:
Hersenstichting (PZ 2016.02.1)
Received: 26 June 2018
Accepted: 10 February 2020
First Online: 17 February 2020
Ethics approval and consent to participate
: The current study did not need approval of the ethical board of the institution, as it did not regard patient information and did not influence patient care. Collected information was on expert opinions only. Regardless, potential experts were informed with the study objectives and procedures. Data was stored according to the Dutch personal data protection act. Participants provided informed consent by agreeing to the invitation that they received.
: Not applicable.
: The authors declare that they have no competing interests.