Received: 25 September 2018
Accepted: 12 April 2019
First Online: 22 May 2019
Ethics approval and consent to participate
: Ethical approval was deemed unnecessary according to the Central Committee on Research Involving Human Subjects (CCMO in Dutch) based on national guidelines regarding ‘Research Involving Human Subjects’. There was no need for consent from participants, since the survey only took a short time to fill in, they could all fill in the survey voluntarily and the content of the survey did not contain radical, incriminating or intimate questions.
: Not applicable since there are no details, images, or videos relating to an individual person.
: JvD is a member of the editorial board (associate editor) of the BMC Pregnancy and Childbirth. All other authors declare that they have no competing interests.
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