Funding for this research was provided by:
Landeszentrum Gesundheit Nordrhein-Westfalen
Received: 22 September 2019
Accepted: 21 April 2020
First Online: 6 May 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the University Bonn Medical School (registration number 254/18). Women in the study group gave their written consent for inclusion into the registry at the time of consent for birth in the AMU.
: Not applicable.
: The authors declare that they have no competing interests.