Günther, Veronika http://orcid.org/0000-0002-1132-1315
Alkatout, Ibrahim
Elessawy, Mohamed
Ackermann, Johannes
Maass, Nicolai
Voigt, Manfred
Article History
Received: 15 March 2018
Accepted: 28 July 2018
First Online: 3 August 2018
Compliance with ethical standards
:
: The authors have no conflict of interest to disclose. The authors had full control of all primary data. The Journal is allowed to review the data if requested.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The data analysed in the present paper were obtained from the routine data collection undertaken by the German Perinatal Survey, a mandatory survey that is conducted throughout Germany. Thus, an additional vote of the ethics committee was not necessary.
: Informed consent was obtained from all individual participants included in the study.