Funding for this research was provided by:
Swiss Academy of Medical Sciences
Lindenhof Foundation Bern
Received: 10 August 2020
Accepted: 22 April 2021
First Online: 10 May 2021
Change Date: 22 June 2021
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/S12884-021-03939-7
: Because this was a nationwide study, all seven regional ethics committees in Switzerland confirmed that, according to the Swiss Human Research Act, the current study did not require ethical approval (Req-2019-00116). Participants were informed about anonymity and the confidentiality of the study data. Informed consent was sought on the first page of the questionnaire, and respondents confirmed that they understood the study information by clicking.
: Not applicable.
: The authors declare that they have no competing interests.