Funding for this research was provided by:
Senatsverwaltung für Bildung, Jugend und Wissenschaft, Berlin
Received: 21 August 2019
Accepted: 8 July 2020
First Online: 29 July 2020
Ethics approval and consent to participate
: The study was approved by the institutional ethic review board at the Charité Universitätsmedizin Berlin, and all participants provided written consent. There was no case of complete illiteracy. All women could at least write their names.
: Not applicable. No individual person’s data in any form (including individual details, images or videos) is being used in this publication.
: The authors declare that they have no competing interests.